diff --git a/Makefile b/Makefile
index ef1903e..750ecc1 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ build.game.linux64:
 	php update-config-version.php
 	cp $(CWD)/vendor/lab.zaar.be/thefish/bearlibterminal/libBearLibTerminal.so $(DISTFOLDER) && \
 	cp $(CWD)/config.json $(DISTFOLDER) && \
-	cp -r $(CWD)/resources $(DISTFOLDER) && \
+	cp -r $(CWD)/assets $(DISTFOLDER) && \
 	$(GO) build -ldflags $(LDFLAGS) -o $(DISTFOLDER)/game $(CWD)/cmd/game/main.go && \
 	strip $(DISTFOLDER)/game && \
 	chmod +x $(DISTFOLDER)/game && \
@@ -40,7 +40,7 @@ build.game.win64:
 	php update-config-version.php
 	cp $(CWD)/lib/win64/BearLibTerminal.dll $(DISTFOLDER) && \
 	cp $(CWD)/config.json $(DISTFOLDER) && \
-	cp -r $(CWD)/resources $(DISTFOLDER) && \
+	cp -r $(CWD)/assets $(DISTFOLDER) && \
 	GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc CXX=x86_64-w64-mingw32-g++ $(GO) build -o $(DISTFOLDER)/game.exe -ldflags $(LDFLAGS) $(CWD)/cmd/game/main.go && \
 	/usr/bin/x86_64-w64-mingw32-strip $(DISTFOLDER)/game.exe && \
 	cd $(DISTFOLDER) && zip -r ../$(PROJECT_NAME)-$(OS)-${PKG_VER}.zip . -x *.git*
@@ -48,7 +48,7 @@ build.game.win64:
 build.game.mac:
 	cp $(CWD)/lib/mac/libBearLibTerminal.dylib $(DISTFOLDER) && \
 	cp $(CWD)/config.json $(DISTFOLDER) && \
-	cp -r $(CWD)/resources $(DISTFOLDER) && \
+	cp -r $(CWD)/assets $(DISTFOLDER) && \
 	OSXCROSS_NO_INCLUDE_PATH_WARNINGS=1 MACOSX_DEPLOYMENT_TARGET=10.6 CC=o64-clang CXX=o64-clang++ GOOS=darwin GOARCH=amd64 CGO_ENABLED=1 $(GO) build -ldflags $(LDFLAGS) -o $(DISTFOLDER)/game $(CWD)/cmd/game/main.go && \
 	strip $(DISTFOLDER)/game.exe && \
 	cd $(DISTFOLDER) && zip -r ../$(PROJECT_NAME)-$(OS)-${PKG_VER}.zip . -x *.git*
diff --git a/TODO b/TODO
new file mode 100644
index 0000000..7421375
--- /dev/null
+++ b/TODO
@@ -0,0 +1,49 @@
+Assets and i18n:
+    - move tile settings to json, generate from there (part of prefabs)
+    - prepare all interface entries for i18n
+    - all texts (terrain, mobs, quests) also in at least 2 languages
+
+ECS & engine:
+    - implement time queue (how to deal with closures?) (?) github.com/thefish/sheduleq - get rid od time.Now inside
+    - move all rendering to systems
+    - try to move input handling to systems
+
+Dungeon and branches:
+    General:
+    - river! (dig_bezier)
+    - erosion (?)
+    - global map of valley
+    Prefabs:
+    + load prefabs
+    - compose from gens and prefabs
+    - editor for prefabs
+    Mapgen
+    - use delaunay -> minimum spanning tree for room connection (Краскал в gonum)
+        github.com/algds/kruskals - MST
+        github.com/esimov/triangle - delaunay
+    - или граф относительных окрестностей
+
+Combat:
+    - generate skeleton / intesines / muscle / eyes&ears & fingers from templates
+        - serializable
+        - config in outer files
+    - mass
+    - damage from skill / mass / speed / material density
+    - no hitpoints! blood is the life source
+
+Items:
+    - pickup
+    - drop
+    - use
+
+Mobs:
+    basic:
+    - place mobs
+    - move mobs
+    advanced:
+    - ai
+    - dijkstra maps
+
+Quest engine:
+    - look at parsers like URQL etc
+    - distorted Aschenputtel story / partisans / rapist prince / Grey Mountains
\ No newline at end of file
diff --git a/resources/fonts-bitmap/ibmnew8x12.png b/assets/fonts/bitmap/ibmnew8x12.png
similarity index 100%
rename from resources/fonts-bitmap/ibmnew8x12.png
rename to assets/fonts/bitmap/ibmnew8x12.png
diff --git a/resources/fonts-ttf/LiberationMono-Bold.ttf b/assets/fonts/ttf/LiberationMono-Bold.ttf
similarity index 100%
rename from resources/fonts-ttf/LiberationMono-Bold.ttf
rename to assets/fonts/ttf/LiberationMono-Bold.ttf
diff --git a/resources/fonts-ttf/UbuntuMono-R.ttf b/assets/fonts/ttf/UbuntuMono-R.ttf
similarity index 100%
rename from resources/fonts-ttf/UbuntuMono-R.ttf
rename to assets/fonts/ttf/UbuntuMono-R.ttf
diff --git a/assets/prefabs/test.json b/assets/prefabs/test.json
new file mode 100644
index 0000000..6559867
--- /dev/null
+++ b/assets/prefabs/test.json
@@ -0,0 +1,39 @@
+{
+  "default_tile_legend": {
+    "?": "any",
+    "#": "wall",
+    ".": "floor",
+    "+": "connector"
+  },
+  "default_mobs_legend": {},
+  "default_item_legend": {},
+
+  "prefabs": [
+    {"name": "test_room_1",
+      "tile_legend": {
+        "D": "decorated_wall",
+        "w": "water",
+        "W": "deep_water"
+      },
+      "mobs_legend": {},
+      "item_legend": {},
+      "size": {"x":16, "y":13},
+      "body": [
+          "???????#+#??????",
+          "???DDDD#.#DDDD??",
+          "###D.........DD?",
+          "+....wwwwwww..D?",
+          "###..wWWWWWw..D?",
+          "??#..wW...Ww..##",
+          "??D..wW.D.Ww...+",
+          "??D..wW...Ww..##",
+          "??D..wWWWWWw..#?",
+          "??D..wwwwwww..D?",
+          "??DD.........DD?",
+          "???DDDD#.#DDDD??",
+          "???????#+#??????"
+      ]
+
+    }
+  ]
+}
diff --git a/cmd/game/main.go b/cmd/game/main.go
index 7c4b5f7..dd278c1 100644
--- a/cmd/game/main.go
+++ b/cmd/game/main.go
@@ -69,21 +69,25 @@ func main() {
 	go decodeInput(mainCtx, mw.GetLayer("base"))
 
 	//fixme set up (load / generate) level
-	level, rooms := mapgens.DefaultGen(gamemap.NewLevel(mainCtx, "test", 1))
+	level, rooms := mapgens.DefaultGen(mainCtx, gamemap.NewLevel(mainCtx, "test", 1))
 	State.Level = level
 
+	sidebarWidth := 0
+
 	//Set up viewport
-	vp := mainwindow.NewViewPort(30, 0, (mw.W - 30), (mw.H - 0), mw.GetLayer("base"))
+	vp := mainwindow.NewViewPort(sidebarWidth, 0, (mw.W - sidebarWidth), (mw.H - 0), mw.GetLayer("base"))
 	go vp.Listen(State)
 
 	//set up controller
 
 	controller := ecs.NewController()
 
-	controller.MapComponentClass("coords", types.Coords{})
-	controller.MapComponentClass("appearance", types.Appearance{})
-	controller.MapComponentClass("mob", mob.Mob{})
-	controller.MapComponentClass("moveable", movement.Moveable{})
+	controller.MapComponentClass(ecs.CoordsComponent, types.Coords{})
+	controller.MapComponentClass(ecs.AppearanceComponent, types.Appearance{})
+	controller.MapComponentClass(ecs.MobComponent, mob.Mob{})
+	controller.MapComponentClass(ecs.MoveableComponent, movement.Moveable{})
+	controller.MapComponentClass(ecs.CarriedComponent, movement.Moveable{})
+	controller.MapComponentClass(ecs.UsableComponent, movement.Moveable{})
 
 	moveable := movement.Moveable{
 		Controller: controller,
@@ -106,7 +110,7 @@ func main() {
 		SetBgColor("#ef1d494f").
 		SetFgColor("white").
 		SetItems([]interface{}{
-			"hjklyubn 12346789 or arrow keys - move",
+			"hjklyubn, NumPad 12346789, arrow keys - move",
 			"s or . - pass turn",
 			"g or , - pick up item",
 			"i - inventory",
@@ -116,9 +120,35 @@ func main() {
 		"z or Z - cast a spell",
 		"p - pray",
 		"Ctrl+p - message log",
-		}),
+		}).MakeList(),
 	)
 
+	screenMgr.AddScreen("inventory", screens.NewMenuScreen(
+		mw,
+		screenMgr,
+		"Inventory",
+		"Items in your backpack:",
+		//"[color=yellow]Note[/color]: Many of these are not implemented yet",
+		"",
+		types.NewCenteredRect(mw.Rect, 70, 25),
+		true, ).
+		SetBgColor("#ef305c70").
+		SetFgColor("white").
+		SetItems([]interface{}{
+			"hjklyubn, NumPad 12346789, arrow keys - move",
+			"s or . - pass turn",
+			"g or , - pick up item",
+			"i - inventory",
+			"? - this screen",
+			"Ctrl+q - exit",
+			"f or F - fire or throw weapon",
+			"z or Z - cast a spell",
+			"p - pray",
+			"Ctrl+p - message log",
+		}).MakeList(),
+	)
+
+
 	screenMgr.SetScreenByName("title")
 
 	//fixme
@@ -144,7 +174,7 @@ func main() {
 
 	controller.AddComponent(player, &types.Appearance{
 		Glyph: &types.PlainGlyphHolder{"@"},
-		ColorSet: &types.TileColorSet{
+		ColorSet: types.TileColorSet{
 			Fg: &types.PlainColorHolder{255, 255, 255, 255},
 		},
 	})
@@ -206,7 +236,7 @@ func decodeInput(ctx util.ClientCtx, baseLayer *mainwindow.Layer) {
 				return
 			}
 			var pressed = ""
-			var isModifier, _ = util.InArray(keycode, modifiers)
+			var isModifier, _ = util.IntInSlice(keycode, modifiers)
 			if !isModifier {
 
 				pressed = ui.Scancodemap[keycode]
@@ -226,7 +256,7 @@ func decodeInput(ctx util.ClientCtx, baseLayer *mainwindow.Layer) {
 				//fixme testing only
 				case "F10":
 					State.Do(func() {
-						blt.Set("window: size=100x47; font: ./resources/fonts-ttf/UbuntuMono-R.ttf, size=11;")
+						blt.Set("window: size=100x47; font: ./assets/ttf/UbuntuMono-R.ttf, size=11;")
 					})
 				case "Ctrl+q":
 					//fallthrough
diff --git a/cmd/mapeditor/editor.go b/cmd/mapeditor/editor.go
index 06ab7d0..876d0a2 100644
--- a/cmd/mapeditor/editor.go
+++ b/cmd/mapeditor/editor.go
@@ -1 +1,7 @@
 package main
+
+import "lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
+
+func main() {
+	_ = gamemap.PrefabRoomsList()
+}
\ No newline at end of file
diff --git a/color_serialization_test.go b/color_serialization_test.go
new file mode 100644
index 0000000..52e71bb
--- /dev/null
+++ b/color_serialization_test.go
@@ -0,0 +1,18 @@
+package alchemyst_go
+
+import (
+	"encoding/json"
+	"fmt"
+	"lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
+	"testing"
+)
+
+func TestSerializeTile (t *testing.T) {
+	wt := gamemap.NewWaterTile()
+	txt, err := json.Marshal(wt)
+	if err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+	fmt.Printf("%s", txt)
+}
diff --git a/config.json b/config.json
index d381d7c..82c7864 100644
--- a/config.json
+++ b/config.json
@@ -4,7 +4,7 @@
     "sizeX": 100,
     "sizeY": 47,
     "fpsLimit": 60,
-    "font": "./resources/fonts-ttf/LiberationMono-Bold.ttf",
+    "font": "./assets/fonts/ttf/LiberationMono-Bold.ttf",
     "fontSize": "9x14",
     "verbosity": "debug"
 }
\ No newline at end of file
diff --git a/engine/ecs/component.go b/engine/ecs/component.go
index 8ffdaaf..ca6f6bb 100644
--- a/engine/ecs/component.go
+++ b/engine/ecs/component.go
@@ -2,8 +2,13 @@ package ecs
 
 // ECS system by jcerise, github.com/jcerise/gogue
 
-import "reflect"
+const AppearanceComponent = "appearance"
+const CoordsComponent = "coords"
+const MobComponent = "mob"
+const MoveableComponent = "movable"
+const CarriedComponent = "carried"
+const UsableComponent = "usable"
 
 type Component interface {
-	TypeOf() reflect.Type
+	Type() string
 }
\ No newline at end of file
diff --git a/engine/ecs/controller.go b/engine/ecs/controller.go
index b948fc6..cd340af 100644
--- a/engine/ecs/controller.go
+++ b/engine/ecs/controller.go
@@ -4,17 +4,16 @@ package ecs
 
 import (
 	"fmt"
-	"reflect"
 	"sort"
 )
 
 type Controller struct {
-	systems map[reflect.Type]System
+	systems map[string]System
 	sortedSystems map[int][]System
 	priorityKeys []int
 	nextEntityID Entity
-	components map[reflect.Type][]Entity
-	entities map[Entity]map[reflect.Type]Component
+	components map[string][]Entity
+	entities map[Entity]map[string]Component
 	deadEntities []int
 
 	// The component map will keep track of what components are available
@@ -24,12 +23,12 @@ type Controller struct {
 // NewController is a convenience/constructor method to properly initialize a new processor
 func NewController() *Controller {
 	controller := Controller{}
-	controller.systems = make(map[reflect.Type]System)
+	controller.systems = make(map[string]System)
 	controller.sortedSystems = make(map[int][]System)
 	controller.priorityKeys = []int{}
 	controller.nextEntityID = 0
-	controller.components = make(map[reflect.Type][]Entity)
-	controller.entities = make(map[Entity]map[reflect.Type]Component)
+	controller.components = make(map[string][]Entity)
+	controller.entities = make(map[Entity]map[string]Component)
 	controller.deadEntities = []int{}
 	controller.componentMap = make(map[string]Component)
 
@@ -47,7 +46,7 @@ func (c *Controller) CreateEntity(components []Component) Entity {
 		}
 	}
 
-	c.entities[c.nextEntityID] = make(map[reflect.Type]Component)
+	c.entities[c.nextEntityID] = make(map[string]Component)
 
 	return c.nextEntityID
 }
@@ -89,7 +88,7 @@ func (c *Controller) GetMappedComponentClass(componentName string) Component {
 // as you can check which entites are associated with a component, and vice versa.
 func (c *Controller) AddComponent(entity Entity, component Component) {
 	// First, get the type of the component
-	componentType := reflect.TypeOf(component)
+	componentType := component.Type()
 
 	// Record that the component type is associated with the entity.
 	c.components[componentType] = append(c.components[componentType], entity)
@@ -97,14 +96,14 @@ func (c *Controller) AddComponent(entity Entity, component Component) {
 	// Now, check to see if the entity is already tracked in the controller entity list. If it is not, add it, and
 	// associate the component with it
 	if _, ok := c.entities[entity]; !ok {
-		c.entities[entity] = make(map[reflect.Type]Component)
+		c.entities[entity] = make(map[string]Component)
 	}
 
 	c.entities[entity][componentType] = component
 }
 
 // HasComponent checks a given entity to see if it has a given component associated with it
-func (c *Controller) HasComponent(entity Entity, componentType reflect.Type) bool {
+func (c *Controller) HasComponent(entity Entity, componentType string) bool {
 	if _, ok := c.entities[entity][componentType]; ok {
 		return true
 	} else {
@@ -113,7 +112,7 @@ func (c *Controller) HasComponent(entity Entity, componentType reflect.Type) boo
 }
 
 // GetComponent returns the component instance for a component type, if one exists for the provided entity
-func (c *Controller) GetComponent(entity Entity, componentType reflect.Type) Component {
+func (c *Controller) GetComponent(entity Entity, componentType string) Component {
 	// Check the given entity has the provided component
 	if c.HasComponent(entity, componentType) {
 		return c.entities[entity][componentType]
@@ -123,7 +122,7 @@ func (c *Controller) GetComponent(entity Entity, componentType reflect.Type) Com
 }
 
 // GetEntity gets a specific entity, and all of its component instances
-func (c *Controller) GetEntity(entity Entity) map[reflect.Type]Component {
+func (c *Controller) GetEntity(entity Entity) map[string]Component {
 	for i, _ := range c.entities {
 		if i == entity {
 			return c.entities[entity]
@@ -134,13 +133,13 @@ func (c *Controller) GetEntity(entity Entity) map[reflect.Type]Component {
 }
 
 // GetEntities returns a map of all entities and their component instances
-func (c *Controller) GetEntities() map[Entity]map[reflect.Type]Component {
+func (c *Controller) GetEntities() map[Entity]map[string]Component {
 	return c.entities
 }
 
 // GetEntitiesWithComponent returns a list of all entities with a given component attached
 // TODO: Allow for passing a list of components
-func (c *Controller) GetEntitiesWithComponent(componentType reflect.Type) []Entity {
+func (c *Controller) GetEntitiesWithComponent(componentType string) []Entity {
 	entitiesWithComponent := make([]Entity, 0)
 	for entity := range c.entities {
 		if c.HasComponent(entity, componentType) {
@@ -152,7 +151,7 @@ func (c *Controller) GetEntitiesWithComponent(componentType reflect.Type) []Enti
 }
 
 // UpdateComponent updates a component on an entity with a new version of the same component
-func (c *Controller) UpdateComponent(entity Entity, componentType reflect.Type, newComponent Component) Entity {
+func (c *Controller) UpdateComponent(entity Entity, componentType string, newComponent Component) Entity {
 	// First, remove the component in question (Don't actually update things, but rather remove and replace)
 	c.RemoveComponent(entity, componentType)
 
@@ -165,7 +164,7 @@ func (c *Controller) UpdateComponent(entity Entity, componentType reflect.Type,
 // DeleteComponent will delete a component instance from an entity, based on component type. It will also remove the
 // association between the component and the entity, and remove the component from the processor completely if no
 // other entities are using it.
-func (c *Controller) RemoveComponent(entity Entity, componentType reflect.Type) Entity {
+func (c *Controller) RemoveComponent(entity Entity, componentType string) Entity {
 	// Find the index of the entity to operate on in the components slice
 	index := -1
 	for i, v := range c.components[componentType] {
@@ -194,7 +193,7 @@ func (c *Controller) RemoveComponent(entity Entity, componentType reflect.Type)
 // numeric order, low to high. If multiple systems are registered as the same priority, they will be randomly run within
 // that priority group.
 func (c *Controller) AddSystem(system System, priority int) {
-	systemType := reflect.TypeOf(system)
+	systemType := system.SystemType()
 
 	if _, ok := c.systems[systemType]; !ok {
 		// A system of this type has not been added yet, so add it to the systems list
@@ -214,10 +213,10 @@ func (c *Controller) AddSystem(system System, priority int) {
 // Process kicks off system processing for all systems attached to the controller. Systems will be processed in the
 // order they are found, or if they have a priority, in priority order. If there is a mix of systems with priority and
 // without, systems with priority will be processed first (in order).
-func (c *Controller) Process(excludedSystems []reflect.Type) {
+func (c *Controller) Process(excludedSystems []string) {
 	for _, key := range c.priorityKeys {
 		for _, system := range c.sortedSystems[key] {
-			systemType := reflect.TypeOf(system)
+			systemType := system.SystemType()
 
 			// Check if the current system type was marked as excluded on this call. If it was, not process it.
 			if !TypeInSlice(systemType, excludedSystems) {
@@ -228,7 +227,7 @@ func (c *Controller) Process(excludedSystems []reflect.Type) {
 }
 
 // HasSystem checks the controller to see if it has a given system associated with it
-func (c *Controller) HasSystem(systemType reflect.Type) bool {
+func (c *Controller) HasSystem(systemType string) bool {
 	if _, ok := c.systems[systemType]; ok {
 		return true
 	} else {
@@ -237,7 +236,7 @@ func (c *Controller) HasSystem(systemType reflect.Type) bool {
 }
 
 // ProcessSystem allows for on demand processing of individual systems, rather than processing all at once via Process
-func (c *Controller) ProcessSystem(systemType reflect.Type) {
+func (c *Controller) ProcessSystem(systemType string) {
 	if c.HasSystem(systemType) {
 		system := c.systems[systemType]
 		system.Process()
diff --git a/engine/ecs/system.go b/engine/ecs/system.go
index 3e8d48d..410dcb5 100644
--- a/engine/ecs/system.go
+++ b/engine/ecs/system.go
@@ -2,6 +2,9 @@ package ecs
 
 // ECS system by jcerise, github.com/jcerise/gogue
 
+const MobRenderSystem = "mobrender"
+
 type System interface {
 	Process()
+	SystemType() string
 }
diff --git a/engine/ecs/systems/mob_render_system.go b/engine/ecs/systems/mob_render_system.go
index 91f3daa..00df355 100644
--- a/engine/ecs/systems/mob_render_system.go
+++ b/engine/ecs/systems/mob_render_system.go
@@ -13,11 +13,11 @@ type MobRenderSystem struct {
 
 func (mrs MobRenderSystem) Process(){
 	for e := range mrs.EntityController.GetEntities() {
-		if mrs.EntityController.HasComponent(e, types.Coords{}.TypeOf()) &&
-			mrs.EntityController.HasComponent(e, types.Appearance{}.TypeOf()) {
+		if mrs.EntityController.HasComponent(e, ecs.CoordsComponent) &&
+			mrs.EntityController.HasComponent(e, ecs.AppearanceComponent) {
 
-			pos := mrs.EntityController.GetComponent(e, types.Coords{}.TypeOf()).(types.Coords)
-			appearance := mrs.EntityController.GetComponent(e, types.Appearance{}.TypeOf()).(types.Appearance)
+			pos := mrs.EntityController.GetComponent(e, ecs.CoordsComponent).(types.Coords)
+			appearance := mrs.EntityController.GetComponent(e, ecs.AppearanceComponent).(types.Appearance)
 
 			//fixme
 			// Clear the cell this entity occupies, so it is the only glyph drawn there
@@ -30,4 +30,8 @@ func (mrs MobRenderSystem) Process(){
 			//gogue.PrintGlyph(pos.X, pos.Y, appearance.Glyph, "", appearance.Layer)
 		}
 	}
+}
+
+func (mrs MobRenderSystem) SystemType() string {
+	return ecs.MobRenderSystem
 }
\ No newline at end of file
diff --git a/engine/ecs/util.go b/engine/ecs/util.go
index 8b077a9..ca22b66 100644
--- a/engine/ecs/util.go
+++ b/engine/ecs/util.go
@@ -2,8 +2,6 @@ package ecs
 
 // ECS system by jcerise, github.com/jcerise/gogue
 
-import "reflect"
-
 // IntInSlice will return true if the integer value provided is present in the slice provided, false otherwise.
 func IntInSlice(a int, list []int) bool {
 	for _, b := range list {
@@ -15,7 +13,7 @@ func IntInSlice(a int, list []int) bool {
 }
 
 // TypeInSlice will return true if the reflect.Type provided is present in the slice provided, false otherwise.
-func TypeInSlice(a reflect.Type, list []reflect.Type) bool {
+func TypeInSlice(a string, list []string) bool {
 	for _, b := range list {
 		if b == a {
 			return true
diff --git a/engine/gamemap/TODO b/engine/gamemap/TODO
deleted file mode 100644
index b6d1783..0000000
--- a/engine/gamemap/TODO
+++ /dev/null
@@ -1,3 +0,0 @@
-- load prefabs
-- compose from gens and prefabs
-- editor for prefabs
\ No newline at end of file
diff --git a/engine/gamemap/level.go b/engine/gamemap/level.go
index 2ca205f..1e06b5b 100644
--- a/engine/gamemap/level.go
+++ b/engine/gamemap/level.go
@@ -82,7 +82,3 @@ func (l *Level) SetAllInvisible() {
 	}
 }
 
-type Room struct {
-	*types.Rect
-	Center types.Coords
-}
\ No newline at end of file
diff --git a/engine/gamemap/mapgens/default.go b/engine/gamemap/mapgens/default.go
index c3da87a..0f548b5 100644
--- a/engine/gamemap/mapgens/default.go
+++ b/engine/gamemap/mapgens/default.go
@@ -1,20 +1,52 @@
 package mapgens
 
 import (
+	"fmt"
 	"lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
 	"lab.zaar.be/thefish/alchemyst-go/engine/types"
 	"lab.zaar.be/thefish/alchemyst-go/util"
 )
+
 //fixme move to config
 var minRoomSize = 3
 var maxRoomSize = 22
-var maxrooms = 30
+var maxrooms = 50
 
-//fixme make closure to stack them
-func DefaultGen(l *gamemap.Level) (*gamemap.Level, []*gamemap.Room) {
+var fges = map[int]types.RectFill{
+	1: types.RectFill{
+		Top:         func() *gamemap.Tile { return gamemap.NewWall() },
+		Bottom:      func() *gamemap.Tile { return gamemap.NewWall() },
+		Left:        func() *gamemap.Tile { return gamemap.NewWall() },
+		Right:       func() *gamemap.Tile { return gamemap.NewWall() },
+		BottomLeft:  func() *gamemap.Tile { return gamemap.NewWall() },
+		BottomRight: func() *gamemap.Tile { return gamemap.NewWall() },
+		TopLeft:     func() *gamemap.Tile { return gamemap.NewWall() },
+		TopRight:    func() *gamemap.Tile { return gamemap.NewWall() },
+		Body:        func() *gamemap.Tile { return gamemap.NewFloor() },
+	},
+
+	2: types.RectFill{
+		Top:         func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		Bottom:      func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		Left:        func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		Right:       func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		BottomLeft:  func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		BottomRight: func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		TopLeft:     func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		TopRight:    func() *gamemap.Tile { return gamemap.NewWaterTile() },
+		Body:        func() *gamemap.Tile { return gamemap.NewDeepWaterTile() },
+	},
+}
+
+func DefaultGen(ctx util.ClientCtx,l *gamemap.Level) (*gamemap.Level, []*gamemap.Room) {
 
 	rng := util.NewRNG()
 
+	//load prefabs
+	//pfLoader := gamemap.NewPrefabLoader(ctx)
+	//pfRooms := pfLoader.PrefabRoomsList()
+
+
 	//fill with walls
 	for i := 0; i < l.W; i ++ {
 		for j := 0; j < l.H; j++ {
@@ -24,35 +56,33 @@ func DefaultGen(l *gamemap.Level) (*gamemap.Level, []*gamemap.Room) {
 
 	rooms := make([]*gamemap.Room, 0)
 
-	//one wall around whole level guaranteed
-	levelBoundary := types.NewRect(l.X + 1, l.Y + 1, l.W - 2, l.H - 2)
-
 	for i := 0; i < maxrooms; i++ {
-		newRoom := &gamemap.Room{
-			Rect: types.NewRect(
-				rng.Range(l.X, l.W),
-				rng.Range(l.Y, l.H),
-				rng.Range(minRoomSize, maxRoomSize),
-				rng.Range(minRoomSize, maxRoomSize),
-			)}
-		newRoom.Center = types.Coords{newRoom.X + newRoom.W / 2, newRoom.Y + newRoom.H / 2}
-
 		failed := false
-
-		if !levelBoundary.InBounds(types.Coords{newRoom.X, newRoom.Y}) {
-			failed = true
+		var fillage types.RectFill
+		fillage = fges[rng.GetWeightedEntity(map[int]int{1: 10, 2: 1})]
+		var newRoom *gamemap.Room
+		//if rng.Range(0, 5) > 3 {
+			newRoom = gamemap.NewRandomRectRoom(
+				rng,
+				rng.Range(minRoomSize, maxRoomSize),
+				rng.Range(minRoomSize, maxRoomSize),
+				fillage,
+			)
+		//} else {
+		//	prefab
+		//	newRoom = &pfRooms[0]
+		//}
+		where := types.Coords{
+			rng.Range(1, l.W -2 - newRoom.W),
+			rng.Range(1, l.H - 2 - newRoom.H),
 		}
 
-		if !failed && !l.InBounds(types.Coords{newRoom.X + newRoom.W, newRoom.Y + newRoom.H}) {
-			failed = true
-		}
+		newRoom.MoveToCoords(where)
 
-		if !failed {
-			for _, otherRoom := range rooms {
-				if otherRoom.Intersects(newRoom.Rect) {
-					failed = true
-					break
-				}
+		for _, otherRoom := range rooms {
+			if otherRoom.Intersects(newRoom.Rect) {
+				failed = true
+				break
 			}
 		}
 
@@ -63,58 +93,39 @@ func DefaultGen(l *gamemap.Level) (*gamemap.Level, []*gamemap.Room) {
 		//addStairs(rooms)
 		//itemize(rooms)
 	}
-	fges := map[int]types.RectFill{
-		1: types.RectFill{
-			Top:         func() *gamemap.Tile { return gamemap.NewWall() },
-			Bottom:      func() *gamemap.Tile { return gamemap.NewWall() },
-			Left:        func() *gamemap.Tile { return gamemap.NewWall() },
-			Right:       func() *gamemap.Tile { return gamemap.NewWall() },
-			BottomLeft:  func() *gamemap.Tile { return gamemap.NewWall() },
-			BottomRight: func() *gamemap.Tile { return gamemap.NewWall() },
-			TopLeft:     func() *gamemap.Tile { return gamemap.NewWall() },
-			TopRight:    func() *gamemap.Tile { return gamemap.NewWall() },
-			Body:        func() *gamemap.Tile { return gamemap.NewFloor() },
-		},
 
-		2: types.RectFill{
-			Top:         func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			Bottom:      func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			Left:        func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			Right:       func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			BottomLeft:  func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			BottomRight: func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			TopLeft:     func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			TopRight:    func() *gamemap.Tile { return gamemap.NewWaterTile() },
-			Body:        func() *gamemap.Tile { return gamemap.NewDeepWaterTile() },
-		},
-	}
+	//build delannay graph from room center
 
-	var fillage types.RectFill
+	//refine it to minimum spanning tree
+
+	//connect accordingly
 	for _, room := range rooms {
-		fillage = fges[rng.GetWeightedEntity(map[int]int{1:10, 2:1})]
-		room.Blit(fillage, l)
+		err := room.BlitToLevel(l)
+		if err != nil {
+			fmt.Printf("err: %v", err)
+		}
 	}
 
 	for idx, room := range rooms {
 		if idx > 0 {
-			connectRooms(l, room, rooms[idx-1], fillage, rng.Range(0,1))
+			connectRooms(l, room, rooms[idx-1], rng.Range(0, 1))
 		}
 	}
 
 	return l, rooms
 }
 
-func connectRooms (l *gamemap.Level, room, otherRoom *gamemap.Room, fillage types.RectFill, toss int) {
+func connectRooms(l *gamemap.Level, room, otherRoom *gamemap.Room, toss int) {
 	if toss == 0 {
-		digHTunnel(l, room.Center.X,otherRoom.Center.X,room.Center.Y, fillage)
-		digVTunnel(l, room.Center.Y,otherRoom.Center.Y,otherRoom.Center.X, fillage)
+		digHTunnel(l, room.Center.X, otherRoom.Center.X, room.Center.Y)
+		digVTunnel(l, room.Center.Y, otherRoom.Center.Y, otherRoom.Center.X)
 	} else {
-		digVTunnel(l, room.Center.Y, otherRoom.Center.Y, room.Center.Y, fillage)
-		digHTunnel(l, room.Center.X, otherRoom.Center.X, otherRoom.Center.Y, fillage)
+		digVTunnel(l, room.Center.Y, otherRoom.Center.Y, room.Center.Y)
+		digHTunnel(l, room.Center.X, otherRoom.Center.X, otherRoom.Center.Y)
 	}
 }
 
-func digHTunnel(l *gamemap.Level, x1,x2,y int, fillage types.RectFill) {
+func digHTunnel(l *gamemap.Level, x1, x2, y int) {
 	var start, finish int
 	if x1 < x2 {
 		start = x1
@@ -125,13 +136,13 @@ func digHTunnel(l *gamemap.Level, x1,x2,y int, fillage types.RectFill) {
 	}
 	for i := start; i <= finish; i++ {
 		if l.InBounds(types.Coords{i, y}) {
-			l.SetTileByXY(i, y, fillage.Body.(func() *gamemap.Tile)())
+			l.SetTileByXY(i, y, gamemap.NewFloor())
 			//l.Tiles[i][y] = gamemap.NewFloor()
 		}
 	}
 }
 
-func digVTunnel(l *gamemap.Level, y1,y2,x int, fillage types.RectFill) {
+func digVTunnel(l *gamemap.Level, y1, y2, x int) {
 	var start, finish int
 	if y1 < y2 {
 		start = y1
@@ -142,7 +153,7 @@ func digVTunnel(l *gamemap.Level, y1,y2,x int, fillage types.RectFill) {
 	}
 	for i := start; i <= finish; i++ {
 		if l.InBounds(types.Coords{x, i}) {
-			l.SetTileByXY(x, i, fillage.Body.(func() *gamemap.Tile)())
+			l.SetTileByXY(x, i, gamemap.NewFloor())
 		}
 	}
 }
diff --git a/engine/gamemap/prefab.go b/engine/gamemap/prefab.go
new file mode 100644
index 0000000..456be2a
--- /dev/null
+++ b/engine/gamemap/prefab.go
@@ -0,0 +1,124 @@
+package gamemap
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"lab.zaar.be/thefish/alchemyst-go/engine/items"
+	"lab.zaar.be/thefish/alchemyst-go/engine/mob"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+	"lab.zaar.be/thefish/alchemyst-go/util"
+)
+
+type PrefabFile struct {
+	DefaultTileLegend map[string]string `json:"default_tile_legend"`
+	DefaultMobsLegend map[string]string `json:"default_mobs_legend"`
+	DefaultItemLegend map[string]string `json:"default_item_legend"`
+	Prefabs           []PrefabRecord
+}
+
+type PrefabRecord struct {
+	name string
+	Size struct {
+		X int `json:"x"`
+		Y int `json:"y"`
+	} `json:"Size"`
+	TileLegend map[string]string `json:"default_tile_legend"`
+	MobsLegend map[string]string `json:"default_mobs_legend"`
+	ItemLegend map[string]string `json:"default_item_legend"`
+	Body       []string          `json:"body"`
+}
+
+func LoadPrefabFile(filename string) (*PrefabFile, error) {
+	data, err := ioutil.ReadFile(filename)
+	if err!= nil {
+		return nil, err
+	}
+	instance := &PrefabFile{}
+	err = json.Unmarshal(data, instance)
+	if err != nil {
+		return nil, err
+	}
+	return instance, nil
+}
+
+type PrefabLoader struct {
+	ctx util.ClientCtx
+}
+
+func NewPrefabLoader(ctx util.ClientCtx) PrefabLoader {
+	return PrefabLoader{ctx: ctx}
+}
+
+func (pfbl PrefabLoader) PrefabRoomsList() []Room {
+
+	rooms := make([]Room, 0)
+	file, err := LoadPrefabFile("./assets/prefabs/test.json")
+	if err !=nil {
+		panic(err)
+	}
+
+	for _, rawPrefab := range file.Prefabs {
+		//prepare actual legends
+		currentTileLegend := file.DefaultTileLegend
+		currentMobsLegend := file.DefaultMobsLegend
+		currentItemLegend := file.DefaultItemLegend
+
+		fmt.Printf("%v",rawPrefab)
+		for k,v := range rawPrefab.TileLegend {
+			currentTileLegend[k] = v
+		}
+		for k,v := range rawPrefab.MobsLegend {
+			currentMobsLegend[k] = v
+		}
+		for k,v := range rawPrefab.ItemLegend {
+			currentItemLegend[k] = v
+		}
+
+		room := Room{
+			Rect:&types.Rect{0, 0, rawPrefab.Size.X, rawPrefab.Size.Y},
+			Center: types.Coords{rawPrefab.Size.X / 2, rawPrefab.Size.Y / 2}, //fixme
+			Geometry: make([]func()*Tile, rawPrefab.Size.X*rawPrefab.Size.Y),
+			Mobs: make([]mob.Mob, rawPrefab.Size.X*rawPrefab.Size.Y),
+			Items: make([]items.Carried, rawPrefab.Size.X*rawPrefab.Size.Y),
+ 			Connectors: make([]types.Coords, rawPrefab.Size.X*rawPrefab.Size.Y),
+		}
+		//make geometry
+		var f func() *Tile
+
+		for j := 0; j < room.H; j++ {
+			str := rawPrefab.Body[j]
+			if len(str) != room.W {
+				continue;
+			}
+			for i:=0; i < room.W; i++ {
+				ok := false
+				shortName := currentTileLegend[string(str[i])]
+				if shortName == "any" {
+					continue
+				}
+				if shortName == "connector" {
+					f = NewFloor
+					room.Connectors = append(room.Connectors, types.Coords{i,j})
+				} else {
+					f, ok = TileTypeMap[shortName]
+				}
+				if (!ok) {
+					pfbl.ctx.Logger().Warn().Msgf("Unknown tile: %s", shortName)
+				}
+				room.Geometry[i+ j*room.W] = f
+			}
+		}
+		//add room to list
+		rooms = append(rooms, room)
+	}
+	return rooms
+}
+
+var TileTypeMap = map[string]func()*Tile{
+	"wall": NewWall,
+	"floor": NewFloor,
+	"decorated_wall": NewDecoratedWall,
+	"water": NewWaterTile,
+	"deep_water": NewDeepWaterTile,
+}
\ No newline at end of file
diff --git a/engine/gamemap/room.go b/engine/gamemap/room.go
new file mode 100644
index 0000000..d086db5
--- /dev/null
+++ b/engine/gamemap/room.go
@@ -0,0 +1,97 @@
+package gamemap
+
+import (
+	"errors"
+	"fmt"
+	"lab.zaar.be/thefish/alchemyst-go/engine/items"
+	"lab.zaar.be/thefish/alchemyst-go/engine/mob"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+	"lab.zaar.be/thefish/alchemyst-go/util"
+)
+
+var invalidBlit = errors.New("trying to blit on existing good tile")
+
+type Room struct {
+	*types.Rect
+	Center     types.Coords
+	Geometry   []func() *Tile
+	Mobs       []mob.Mob
+	Items      []items.Carried
+	Connectors []types.Coords
+}
+
+func (r *Room) Put (x, y int, tileFunc interface{}) {
+	tf := tileFunc.(func() *Tile)
+	if tf == nil {
+		return //fixme error
+	}
+	if r.InBounds(types.Coords{x, y}) {
+		r.Geometry[x+y*r.W] = tf
+	}
+}
+
+func (room *Room) BlitToLevel(l *Level) error {
+	//copy tiles like this:
+	//https://stackoverflow.com/questions/21011023/copy-pointer-values-a-b-in-golang
+
+	for j := 0; j < room.H; j++ {
+
+		for i := 0; i < room.W; i++ {
+			mapCoords := types.Coords{room.X + i, room.Y + j}
+			underlyingTile := l.GetTile(mapCoords)
+
+			tileFunc := room.Geometry[i+j*room.W]
+
+			if tileFunc == nil {
+				continue
+			}
+			//check underlying tile
+			if underlyingTile == nil ||
+				underlyingTile.Name != "Wall" {
+				fmt.Println("Invalid blit!")
+				return invalidBlit
+			}
+			l.Put(mapCoords.X, mapCoords.Y, tileFunc)
+		}
+	}
+
+	return nil
+}
+
+func (room *Room) MoveToCoords(where types.Coords) *Room {
+	//update room coords?
+	room.X = where.X
+	room.Y = where.Y
+	//update centers!
+	room.Center.X += where.X
+	room.Center.Y += where.Y
+	//update connector?
+	for i, _ := range room.Connectors {
+		room.Connectors[i].X += where.X
+		room.Connectors[i].Y += where.Y
+	}
+	return room
+}
+
+func NewRandomRectRoom(rng *util.RNG, w, h int, fillage types.RectFill) *Room {
+	newRoom := &Room{
+		Rect: types.NewRect(
+			0,
+			0,
+			w,
+			h,
+		),
+		Center: types.Coords{w / 2, h /2 },
+		Geometry: make([]func()*Tile, w*h),
+	}
+	newRoom.Blit(fillage, newRoom)
+	//add connectors
+	newRoom.Connectors = append(
+		newRoom.Connectors,
+		types.Coords{rng.Range(1, w - 2), 0},
+		types.Coords{rng.Range(1, w - 2), h -1},
+		types.Coords{0,  rng.Range(1, h - 2)},
+		types.Coords{w - 1,  rng.Range(1, h - 2)},
+	)
+	return newRoom
+}
diff --git a/engine/gamemap/tile.go b/engine/gamemap/tile.go
index 3a5aae2..6a910f5 100644
--- a/engine/gamemap/tile.go
+++ b/engine/gamemap/tile.go
@@ -10,7 +10,6 @@ type Tile struct {
 	Description string `json:"desc"`
 	BlocksPass  bool   `json:"blocksPass"`
 	BlocksSight bool   `json:"blocksSight"`
-	Colordance  bool   `json:"colordance"`
 	Explored    bool
 	MustDraw    bool
 	Visible     bool
@@ -37,6 +36,26 @@ func (t *Tile) GetRawBgColor() uint32 {
 }
 
 func NewWall() *Tile {
+	return &Tile{
+		Name:        "Wall",
+		Description: "A dull rock wall",
+		BlocksPass:  false,
+		BlocksSight: true,
+		Explored:    false,
+		MustDraw:    false,
+		Appearance: &Appearance{
+			Glyph: &PlainGlyphHolder{"#"},
+			ColorSet: TileColorSet{
+				Fg:     &PlainColorHolder{255, 130, 110, 150},
+				Bg:     &PlainColorHolder{255, 172, 170, 173},
+				DarkFg: &PlainColorHolder{255, 20, 20, 68},
+				DarkBg: &PlainColorHolder{255, 7, 7, 30},
+			},
+		},
+	}
+}
+
+func NewDecoratedWall() *Tile {
 	return &Tile{
 		Name:        "Wall",
 		Description: "A dull rock wall",
@@ -46,9 +65,15 @@ func NewWall() *Tile {
 		MustDraw:    false,
 		Appearance: &Appearance{
 			Glyph: &PlainGlyphHolder{"#"},
-			ColorSet: &TileColorSet{
+			ColorSet: TileColorSet{
 				Fg:     &PlainColorHolder{255, 130, 110, 150},
-				Bg:     &PlainColorHolder{255, 172, 170, 173},
+				//Bg:     &PlainColorHolder{255, 172, 170, 173},
+				Bg:     &DanceColorHolder{
+					255,
+					DeviatedColorRing(172, -15, 10),
+					DeviatedColorRing(170, -5, 15),
+					DeviatedColorRing(173, -10, 10),
+				},
 				DarkFg: &PlainColorHolder{255, 20, 20, 68},
 				DarkBg: &PlainColorHolder{255, 7, 7, 30},
 			},
@@ -66,7 +91,7 @@ func NewFloor() *Tile {
 		MustDraw:    false,
 		Appearance: &Appearance{
 			Glyph: &PlainGlyphHolder{"."},
-			ColorSet: &TileColorSet{
+			ColorSet: TileColorSet{
 				Fg:     &PlainColorHolder{255, 220, 220, 250},
 				Bg:     &PlainColorHolder{255, 19, 19, 70},
 				DarkFg: &PlainColorHolder{255, 30, 20, 50},
@@ -85,11 +110,10 @@ func NewWaterTile() *Tile {
 		BlocksSight: false,
 		Explored:    false,
 		MustDraw:    true, //fixme debug
-		Colordance:  true,
 
 		Appearance: &Appearance{
 			Glyph: &PlainGlyphHolder{" "},
-			ColorSet: &TileColorSet{
+			ColorSet: TileColorSet{
 				Fg: &PlainColorHolder{255, 220, 220, 250},
 				Bg: &DanceColorHolder{
 					255,
@@ -113,10 +137,9 @@ func NewDeepWaterTile() *Tile {
 		BlocksSight: false,
 		Explored:    false,
 		MustDraw:    true, //fixme debug
-		Colordance:  true,
 		Appearance: &Appearance{
 			Glyph: &PlainGlyphHolder{" "},
-			ColorSet: &TileColorSet{
+			ColorSet: TileColorSet{
 				Fg: &PlainColorHolder{255, 220, 220, 250},
 				Bg: &DanceColorHolder{
 					255,
diff --git a/engine/items/carried.go b/engine/items/carried.go
new file mode 100644
index 0000000..ef4ecad
--- /dev/null
+++ b/engine/items/carried.go
@@ -0,0 +1,9 @@
+package items
+
+import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+
+type Carried struct {}
+
+func (c *Carried) Type() string {
+	return ecs.CarriedComponent
+}
diff --git a/engine/items/useable.go b/engine/items/useable.go
new file mode 100644
index 0000000..dd8efaf
--- /dev/null
+++ b/engine/items/useable.go
@@ -0,0 +1,10 @@
+package items
+
+import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+
+type Useable struct {}
+
+
+func (u *Useable) Type() string {
+	return ecs.UsableComponent
+}
\ No newline at end of file
diff --git a/engine/mob/mob.go b/engine/mob/mob.go
index ec9892f..cd4df82 100644
--- a/engine/mob/mob.go
+++ b/engine/mob/mob.go
@@ -1,8 +1,8 @@
 package mob
 
 import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
 	"lab.zaar.be/thefish/alchemyst-go/engine/types"
-	"reflect"
 )
 
 type Mob struct {
@@ -15,6 +15,6 @@ func (m *Mob) Render() {
 
 }
 
-func (mob Mob) TypeOf() reflect.Type {
-	return reflect.TypeOf(mob)
+func (mob Mob) Type() string {
+	return ecs.MobComponent
 }
\ No newline at end of file
diff --git a/engine/mob/movement/movement.go b/engine/mob/movement/movement.go
index d6bde6b..67d408d 100644
--- a/engine/mob/movement/movement.go
+++ b/engine/mob/movement/movement.go
@@ -5,7 +5,6 @@ import (
 	"lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
 	"lab.zaar.be/thefish/alchemyst-go/engine/mob"
 	"lab.zaar.be/thefish/alchemyst-go/engine/types"
-	"reflect"
 )
 
 type Moveable struct {
@@ -13,6 +12,9 @@ type Moveable struct {
 	Level *gamemap.Level
 }
 
+func (mov Moveable) Type() string {
+	return ecs.MoveableComponent
+}
 
 func (mov Moveable) Walk() {
 
@@ -23,9 +25,9 @@ func (mov Moveable) IsBlocked(c types.Coords) bool {
 	if mov.Level.GetTile(c).BlocksPass == true {
 		return true
 	}
-	list :=  mov.Controller.GetEntitiesWithComponent(mob.Mob{}.TypeOf())
+	list :=  mov.Controller.GetEntitiesWithComponent(ecs.MobComponent)
 	for idx, _ := range list {
-		coords := mov.Controller.GetComponent(list[idx], types.Coords{}.TypeOf())
+		coords := mov.Controller.GetComponent(list[idx], ecs.CoordsComponent)
 		if coords == nil {
 			continue
 		}
@@ -33,7 +35,7 @@ func (mov Moveable) IsBlocked(c types.Coords) bool {
 		if coords != c {
 			continue
 		}
-		m := mov.Controller.GetComponent(list[idx], mob.Mob{}.TypeOf())
+		m := mov.Controller.GetComponent(list[idx], ecs.MobComponent)
 		if m == nil {
 			continue
 		}
@@ -43,7 +45,3 @@ func (mov Moveable) IsBlocked(c types.Coords) bool {
 	}
 	return false
 }
-
-func (mov Moveable) TypeOf() reflect.Type {
-	return reflect.TypeOf(mov)
-}
diff --git a/engine/screens/game.go b/engine/screens/game.go
index 49e9aa2..81fb057 100644
--- a/engine/screens/game.go
+++ b/engine/screens/game.go
@@ -65,6 +65,9 @@ func (ts *GameScreen) HandleInput(input string) {
 	case "Shift+/":
 		ts.scm.SetScreenByName("help")
 		break
+	case "i":
+		ts.scm.SetScreenByName("inventory")
+		break
 	default:
 		ts.mw.GetLayer("base").ClearArea(0, 3, 40, 1)
 		ts.mw.GetLayer("base").Print(1, 3, "Key: "+input)
@@ -80,12 +83,12 @@ func (ts *GameScreen) Render() {
 
 func (ts *GameScreen) walk(state *gamestate.GameState, dx, dy int) {
 	controller := state.Controller
-	coords := controller.GetComponent(state.Player, types.Coords{}.TypeOf()).(types.Coords)
+	coords := controller.GetComponent(state.Player, ecs.CoordsComponent).(types.Coords)
 	newCoords := types.Coords{coords.X + dx, coords.Y + dy}
-	movable := controller.GetComponent(state.Player, movement.Moveable{}.TypeOf()).(movement.Moveable)
+	movable := controller.GetComponent(state.Player, ecs.MoveableComponent).(movement.Moveable)
 
 	if !movable.IsBlocked(newCoords) {
-		controller.UpdateComponent(state.Player, types.Coords{}.TypeOf(), newCoords)
+		controller.UpdateComponent(state.Player, ecs.CoordsComponent, newCoords)
 	}
 
 	state.Redraw <- struct{}{}
diff --git a/engine/screens/menu.go b/engine/screens/menu.go
index 257f1f1..4ac7909 100644
--- a/engine/screens/menu.go
+++ b/engine/screens/menu.go
@@ -1,6 +1,7 @@
 package screens
 
 import (
+	"fmt"
 	"lab.zaar.be/thefish/alchemyst-go/engine/types"
 	"lab.zaar.be/thefish/alchemyst-go/ui/mainwindow"
 	blt "lab.zaar.be/thefish/bearlibterminal"
@@ -16,7 +17,12 @@ type MenuScreen struct {
 	scm          *types.ScreenManager
 	renderParent bool
 
-	items   []interface{}
+	items  []interface{}
+	offset int
+
+	drawFunc  func()
+	inputFunc func(string)
+
 	title   string
 	header  string
 	footer  string
@@ -37,6 +43,12 @@ func NewMenuScreen(mw *mainwindow.MainWindow, scm *types.ScreenManager, title, h
 	}
 }
 
+func (ms *MenuScreen) MakeList() *MenuScreen {
+	ms.drawFunc = ms.ListRender
+	ms.inputFunc = ms.ListHandleInput
+	return ms
+}
+
 func (ms *MenuScreen) SetBgColor(color string) *MenuScreen {
 	ms.bgColor = color
 	return ms
@@ -58,21 +70,11 @@ func (ms *MenuScreen) UseEcs() bool { return false }
 
 func (ms *MenuScreen) Enter() {
 	ms.redraw = true
+	ms.offset = 0
 }
 
 func (ms *MenuScreen) HandleInput(input string) {
-	//
-	//if input != "" {
-	//	ms.redraw = true
-	//}
-
-	switch input {
-	case "Escape":
-		fallthrough
-	case "Space":
-		ms.scm.SetScreen(ms.scm.PreviousScreen)
-		break
-	}
+	ms.inputFunc(input)
 }
 
 func (ms *MenuScreen) Exit() {
@@ -88,31 +90,77 @@ func (ms *MenuScreen) Render() {
 	}
 	if (ms.redraw || ms.renderParent) {
 		ms.redraw = false
-		menuLayer := ms.mw.GetLayer("menu")
-		menuLayer.ClearRect(ms.Rect)
-		bgLayer := ms.mw.GetLayer("menubg")
-		bgLayer.ClearRect(ms.Rect)
-		bgLayer.WithColor(ms.bgColor).NewWindow(ms.Rect).Splash()
-		menuLayer.WithColor(ms.fgColor).NewWindow(ms.Rect).DoubleBordered(ms.title)
-		menuLayer.Print(ms.X+(ms.W/2)-7, ms.Y+ms.H-1, "╡"+"[color=green]Space[/color] to close"+"╞")
-		footerHeight := 0
-		if ms.footer != "" {
-			_, footerHeight = menuLayer.PrintInside(ms.Rect, ms.footer, 9)
-			footerHeight = footerHeight + 2
-		}
-		_, headerHeight := menuLayer.PrintInside(ms.Rect, ms.header, blt.TK_ALIGN_LEFT)
-		itemField := types.Rect{ms.X, ms.Y + headerHeight + 1, ms.W, ms.H - headerHeight - footerHeight}
-		_ = itemField
-		if (len(ms.items) > 0) {
-			//fixme itemfield object, scroller, inputhandler, current selected item
-			menuItems := make([]string, 0)
-			for i, _ := range ms.items {
-				if string(ms.items[i].(string)) != "" {
-					menuItems = append(menuItems, ms.items[i].(string))
-				}
-			}
-			menuLayer.PrintInside(&itemField, strings.Join(menuItems, "\n"), blt.TK_ALIGN_LEFT)
-
-		}
+		ms.drawFunc()
 	}
 }
+
+func (ms *MenuScreen) ListHandleInput(input string) {
+	switch input {
+	case "Up":
+		ms.offset = ms.offset - 1
+		if ms.offset < 0 {
+			ms.offset = 0
+		}
+		break
+	case "Down":
+		ms.offset = ms.offset + 1
+		if ms.offset > len(ms.items)-1 {
+			ms.offset = len(ms.items) - 1
+		}
+		break
+	case "Escape":
+		fallthrough
+	case "Space":
+		ms.scm.SetScreen(ms.scm.PreviousScreen)
+		break
+	}
+}
+
+func (ms *MenuScreen) ListRender() {
+	menuLayer := ms.mw.GetLayer("menu")
+	menuLayer.ClearRect(ms.Rect)
+	bgLayer := ms.mw.GetLayer("menubg")
+	bgLayer.ClearRect(ms.Rect)
+	bgLayer.WithColor(ms.bgColor).NewWindow(ms.Rect).Splash()
+	menuLayer.WithColor(ms.fgColor).NewWindow(ms.Rect).DoubleBordered(ms.title)
+	menuLayer.Print(ms.X+(ms.W/2)-7, ms.Y+ms.H-1, "╡"+"[color=green]Space[/color] to close"+"╞")
+	footerHeight := 0
+	if ms.footer != "" {
+		_, footerHeight = menuLayer.PrintInside(ms.Rect, ms.footer, 9)
+		footerHeight = footerHeight + 2
+	}
+	_, headerHeight := menuLayer.PrintInside(ms.Rect, ms.header, blt.TK_ALIGN_LEFT)
+	itemField := types.Rect{ms.X, ms.Y + headerHeight + 1, ms.W, ms.H - headerHeight - footerHeight}
+	_ = itemField
+	var ilw, ilh int
+	if (len(ms.items) > 0) {
+		//fixme itemfield object, scroller, inputhandler, current selected item
+		menuItems := make([]string, 0)
+		for i := ms.offset; i < len(ms.items); i++ {
+			if string(ms.items[i].(string)) != "" {
+				menuItems = append(menuItems, ms.items[i].(string))
+			}
+		}
+		ilw, ilh = menuLayer.PrintInside(&itemField, strings.Join(menuItems, "\n"), blt.TK_ALIGN_LEFT)
+	}
+	if ilh < len(ms.items) {
+		ms.drawScrollBar(menuLayer, itemField)
+	}
+	if ilw > itemField.W-4 {
+		fmt.Printf("Excess width of item names found! Need h-scroll of certain names")
+	}
+}
+
+func (ms *MenuScreen) drawScrollBar(menuLayer *mainwindow.Layer, itemField types.Rect) {
+	scrollbarBg := types.NewRect(itemField.X+itemField.W-2, itemField.Y + 1, 1, itemField.H - 4)
+	menuLayer.WithColor("#77000000").NewWindow(scrollbarBg).Splash()
+	//tick
+	menuLayer.WithColor(ms.fgColor).Put(
+		scrollbarBg.X,
+		scrollbarBg.Y + int(float64(ms.offset) / float64(len(ms.items)) * float64(scrollbarBg.H)),
+		"⏹",
+	)
+	menuLayer.WithColor(ms.fgColor).Put(itemField.X+itemField.W-2, itemField.Y+scrollbarBg.H + 1, "↓")
+	menuLayer.WithColor(ms.fgColor).Put(itemField.X+itemField.W-2, itemField.Y, "↑")
+
+}
diff --git a/engine/screens/title.go b/engine/screens/title.go
index bfd10b4..619bc02 100644
--- a/engine/screens/title.go
+++ b/engine/screens/title.go
@@ -29,7 +29,9 @@ func (ts *TitleScreen) Exit() {
 	blt.Clear()
 }
 func (ts *TitleScreen) Render() {
-	blt.PrintExt(0, 0, ts.mw.W, ts.mw.H, 15, logo)
+	blt.PrintExt(0, 2, ts.mw.W, ts.mw.H, blt.TK_ALIGN_CENTER, logo)
+	blt.PrintExt(0, 19, ts.mw.W, ts.mw.H, blt.TK_ALIGN_CENTER, menu)
+	blt.PrintExt(0, 35, ts.mw.W, ts.mw.H, 3, credits)
 }
 
 var logo = `
@@ -45,8 +47,9 @@ var logo = `
 ;k.   .Ox Ok..'.,l ;Kk:;dk cKl   lX: dKc,;oc kx    kk     OO    dKl;lk:   .0O   
 l;     ,o .kK0KKK;   :Ok;   c;    l:  .oxc.  x:    Ol     xl     .dk:      .o   
 
+`
 
-
+var menu = `
 Alchemyst (c) 2011-2014 thefish <thefish@zaar.be>
 
 
@@ -55,9 +58,9 @@ Alchemyst (c) 2011-2014 thefish <thefish@zaar.be>
 [color=green]L[/color]oad saved game
 Read [color=green]h[/color]elp file 
 Highest [color=green]S[/color]cores 
+`
 
-
-
+var credits = `
 Roguebasin Libtcod Tutorial (c) 2010-2011, Jotaf Henriques                  
 Brogue 1.3 (c) 2010 Brian Walker                                            
 Madness (c) 2010 hmp <humpolec@gmail.com>                                   
diff --git a/engine/types/appearance.go b/engine/types/appearance.go
index f3d921a..0b10d3c 100644
--- a/engine/types/appearance.go
+++ b/engine/types/appearance.go
@@ -1,9 +1,11 @@
 package types
 
 import (
+	"bytes"
+	"fmt"
 	"github.com/gammazero/deque"
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
 	"lab.zaar.be/thefish/alchemyst-go/util"
-	"reflect"
 )
 import blt "lab.zaar.be/thefish/bearlibterminal"
 
@@ -29,12 +31,12 @@ type DanceColorHolder struct {
 	B *cdeque
 }
 
-func (chd *DanceColorHolder) GetColor() uint32 {
+func (dch DanceColorHolder) GetColor() uint32 {
 	return blt.ColorFromARGB(
-		chd.A,
-		chd.R.Next(),
-		chd.G.Next(),
-		chd.B.Next(),
+		dch.A,
+		dch.R.Next(),
+		dch.G.Next(),
+		dch.B.Next(),
 	)
 }
 
@@ -45,7 +47,7 @@ type PlainColorHolder struct {
 	B uint8
 }
 
-func (chb *PlainColorHolder) GetColor() uint32 {
+func (chb PlainColorHolder) GetColor() uint32 {
 	return blt.ColorFromARGB(
 		chb.A,
 		chb.R,
@@ -55,10 +57,10 @@ func (chb *PlainColorHolder) GetColor() uint32 {
 }
 
 type TileColorSet struct {
-	Fg     ColorHolder
-	Bg     ColorHolder
-	DarkFg ColorHolder
-	DarkBg ColorHolder
+	Fg     ColorHolder `json:"fg"`
+	Bg     ColorHolder `json:"bg"`
+	DarkFg ColorHolder `json:"darkfg"`
+	DarkBg ColorHolder `json:"darkbg"`
 }
 
 
@@ -70,13 +72,13 @@ type PlainGlyphHolder struct {
 	Glyph string
 }
 
-func (pch *PlainGlyphHolder) GetGlyph() string {
-	return pch.Glyph
+func (pgh PlainGlyphHolder) GetGlyph() string {
+	return pgh.Glyph
 }
 
 type Appearance struct {
-	Glyph    GlyphHolder   `json:"char"`
-	ColorSet *TileColorSet `json:"colorSet"`
+	Glyph    GlyphHolder   `json:"glyph"`
+	ColorSet TileColorSet `json:"colorSet"`
 }
 
 func SingleColorRing(colorValue uint8) *cdeque {
@@ -106,6 +108,90 @@ func FillColorRing(colorValue uint8, minGlow, maxGlow, step int) *cdeque {
 	return c
 }
 
-func (app Appearance) TypeOf() reflect.Type {
-	return reflect.TypeOf(app)
+func DeviatedColorRing(colorValue uint8, minGlow, maxGlow int) *cdeque {
+	q := make([]uint8, 0)
+	color := int(colorValue)
+	color = crng.Range(minGlow, maxGlow) + color
+	q = append(q, colorValue)
+	c := &cdeque{}
+	c.PushBack(uint8(color))
+	return c
+}
+
+func (app Appearance) Type() string {
+	return ecs.AppearanceComponent
+}
+
+func (app *Appearance) MarshalJSON() ([]byte, error) {
+	buffer := bytes.NewBufferString("{")
+	//glyph
+	buffer.WriteString(`"glyph":{`)
+	if _, ok := app.Glyph.(*PlainGlyphHolder); ok {
+		buffer.WriteString(fmt.Sprintf(`"type":"plain", "chars":"%s"`, app.Glyph.GetGlyph()))
+	}
+	buffer.WriteString("},")
+
+	//color
+	buffer.WriteString(`"color":{`)
+	buffer.WriteString(getColorJson("fg", app.ColorSet.Fg) + ",")
+	buffer.WriteString(getColorJson("bg", app.ColorSet.Bg) + ",")
+	buffer.WriteString(getColorJson("darkfg", app.ColorSet.DarkFg) + ",")
+	buffer.WriteString(getColorJson("darkbg", app.ColorSet.DarkBg))
+
+	buffer.WriteString("}")
+
+	buffer.WriteString("}")
+
+	fmt.Printf("\n\nbuffer: %s\n\n", buffer.String())
+
+	return buffer.Bytes(), nil
+}
+
+func (app *Appearance) UnmarshalJSON(buffer []byte) error {
+	return nil
+}
+
+func getColorJson(field string, holder ColorHolder) string {
+	result := ""
+	if _, dch := holder.(*DanceColorHolder); dch {
+		result = fmt.Sprintf(`{"dance":{`)
+		result = result + detectRing("a", holder.(*DanceColorHolder).A) + ","
+		result = result + detectRing("r", holder.(*DanceColorHolder).R) + ","
+		result = result + detectRing("g", holder.(*DanceColorHolder).G) + ","
+		result = result + detectRing("b", holder.(*DanceColorHolder).B)
+		result = result + "}}"
+	}
+	if _, pch := holder.(*PlainColorHolder); pch {
+		result = fmt.Sprintf(`{"plain":[%d,%d,%d,%d]}`,
+			holder.(*PlainColorHolder).A,
+			holder.(*PlainColorHolder).R,
+			holder.(*PlainColorHolder).G,
+			holder.(*PlainColorHolder).B,
+		)
+	}
+	return fmt.Sprintf(`"%s":%s`, field, result)
+}
+
+func detectRing(channel string, something interface{}) string {
+	result := ""
+
+	switch something.(type) {
+	case (int),(uint8):
+		result += fmt.Sprintf(`"%s":{"plain":%d}`, channel, something)
+	case (*cdeque):
+		fmt.Printf("%v", something)
+		if something.(*cdeque).Len() == 1 {
+			//fixme right now we can not distinct plain and deviated
+			result += fmt.Sprintf(`"%s":{"single":[%v]}`, channel, something.(*cdeque).Front())
+		} else {
+			result += fmt.Sprintf(`"%s":{"fill":[%v, %v, %v, %v]}`,
+				channel,
+				something.(*cdeque).Front(),
+				something.(*cdeque).Next(),
+				something.(*cdeque).Next(),
+				something.(*cdeque).Next(),
+			)
+		}
+	}
+	return result
 }
\ No newline at end of file
diff --git a/engine/types/coords.go b/engine/types/coords.go
index d7d5923..9fb5137 100644
--- a/engine/types/coords.go
+++ b/engine/types/coords.go
@@ -1,16 +1,16 @@
 package types
 
 import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
 	"math"
-	"reflect"
 )
 
 type Coords struct {
 	X, Y int
 }
 
-func (сс Coords) TypeOf() reflect.Type {
-	return reflect.TypeOf(сс)
+func (сс Coords) Type() string {
+	return ecs.CoordsComponent
 }
 
 func (c *Coords) Get() (int, int) {
diff --git a/go.mod b/go.mod
index bedfbfa..d6957dc 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,14 @@ module lab.zaar.be/thefish/alchemyst-go
 go 1.12
 
 require (
+	github.com/esimov/triangle v1.0.4 // indirect
+	github.com/fogleman/astar v0.0.0-20160904014929-93992825fbf3 // indirect
+	github.com/fogleman/gg v1.3.0 // indirect
 	github.com/gammazero/deque v0.0.0-20190521012701-46e4ffb7a622
 	github.com/rs/zerolog v1.15.0
+	golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136 // indirect
+	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
+	golang.org/x/tools v0.0.0-20191109212701-97ad0ed33101
+	gonum.org/v1/gonum v0.6.0 // indirect
 	lab.zaar.be/thefish/bearlibterminal v0.0.0-20191018101635-dd37bbc90d77
 )
diff --git a/go.sum b/go.sum
index 7d9ca82..8f6017f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,16 +1,62 @@
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/ajstarks/svgo v0.0.0-20180226025133-644b8db467af/go.mod h1:K08gAheRH3/J6wwsYMMT4xOr94bZjxIelGM0+d/wbFw=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/esimov/triangle v1.0.4 h1:vmEwL5zBPRbN5+GmJE5Dk38IV/v8Zkdp34+yaGr4zrY=
+github.com/esimov/triangle v1.0.4/go.mod h1:EKT/GJbKyDWK5IdEgx+wKjcj6zI0Wd27+p2zRgjfdKo=
+github.com/fogleman/astar v0.0.0-20160904014929-93992825fbf3 h1:H1UdXUq3kFKSHmoISZ+B3EWukjHvAg8y9VFYO3bXHB8=
+github.com/fogleman/astar v0.0.0-20160904014929-93992825fbf3/go.mod h1:oaWu1Maoxg5V3KjA0zGlhwwLAalGLjOFGFblaiHLwMc=
+github.com/fogleman/gg v1.2.1-0.20190220221249-0403632d5b90/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
+github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8=
+github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
 github.com/gammazero/deque v0.0.0-20190521012701-46e4ffb7a622 h1:lxbhOGZ9pU3Kf8P6lFluUcE82yVZn2EqEf4+mWRNPV0=
 github.com/gammazero/deque v0.0.0-20190521012701-46e4ffb7a622/go.mod h1:D90+MBHVc9Sk1lJAbEVgws0eYEurY4mv2TDso3Nxh3w=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/jung-kurt/gofpdf v1.0.3-0.20190309125859-24315acbbda5/go.mod h1:7Id9E/uU8ce6rXgefFLlgrJj/GYY22cpxn+r32jIOes=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
 github.com/rs/zerolog v1.15.0 h1:uPRuwkWF4J6fGsJ2R0Gn2jB1EQiav9k3S6CSdygQJXY=
 github.com/rs/zerolog v1.15.0/go.mod h1:xYTKnLHcpfU2225ny5qZjxnj9NvkumZYjJHlAThCjNc=
 github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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 golang.org/x/tools v0.0.0-20190425163242-31fd60d6bfdc/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
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+gonum.org/v1/gonum v0.0.0-20180816165407-929014505bf4/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
+gonum.org/v1/gonum v0.6.0 h1:DJy6UzXbahnGUf1ujUNkh/NEtK14qMo2nvlBPs4U5yw=
+gonum.org/v1/gonum v0.6.0/go.mod h1:9mxDZsDKxgMAuccQkewq682L+0eCu4dCN2yonUJTCLU=
+gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw=
+gonum.org/v1/plot v0.0.0-20190515093506-e2840ee46a6b/go.mod h1:Wt8AAjI+ypCyYX3nZBvf6cAIx93T+c/OS2HFAYskSZc=
 lab.zaar.be/thefish/bearlibterminal v0.0.0-20191018101635-dd37bbc90d77 h1:ElfFSOSxp1PViWH7+iKZ8sZvEhaKN9o3vt13+hX2yaE=
 lab.zaar.be/thefish/bearlibterminal v0.0.0-20191018101635-dd37bbc90d77/go.mod h1:tV7Vxx6vf9dPgj9B+RPeSrmtRl8nTSH07HIyBSSnEc4=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
diff --git a/prefab_test.go b/prefab_test.go
new file mode 100644
index 0000000..99c883b
--- /dev/null
+++ b/prefab_test.go
@@ -0,0 +1,17 @@
+package alchemyst_go
+
+import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
+	"testing"
+)
+
+func TestPrefabLoad(t *testing.T) {
+
+	testFile, err := gamemap.LoadPrefabFile("./assets/prefabs/test.json")
+	if err!= nil {
+		t.Log(err)
+		t.Fail()
+	}
+	t.Log(testFile)
+
+}
diff --git a/ui/keyinput.go b/ui/keyinput.go
index e13cbfb..5296710 100644
--- a/ui/keyinput.go
+++ b/ui/keyinput.go
@@ -13,7 +13,7 @@ func ReadKey() (string, int) {
 	}
 	var key = blt.Read()
 	var pressed = ""
-	var isModifier, _ = util.InArray(key, modifiers)
+	var isModifier, _ = util.IntInSlice(key, modifiers)
 	if !isModifier {
 
 		pressed = Scancodemap[key]
@@ -38,5 +38,4 @@ func ReadKeyCode() int {
 		return blt.TK_NONE
 	}
 	return blt.Read()
-
 }
diff --git a/ui/mainwindow/mainwindow.go b/ui/mainwindow/mainwindow.go
index f23b75f..25daf6e 100644
--- a/ui/mainwindow/mainwindow.go
+++ b/ui/mainwindow/mainwindow.go
@@ -42,7 +42,7 @@ func (mw *MainWindow) Open() {
 	//blt.Set("window: size=80x25, title="+config.Title+" v"+string(version)+"; font: ./fonts/Monaco-Linux.ttf, size=10")
 	blt.Set(
 		fmt.Sprintf(
-			//"window: size=%dx%d, title='%s v%s'; font: ./resources/fonts-bitmap/ibmnew8x12.png, size=8x12;",
+			//"window: size=%dx%d, title='%s v%s'; font: ./assets/fonts/bitmap/ibmnew8x12.png, size=8x12;",
 			"window: size=%dx%d, title='%s %s'; font: %s, size=%s;",
 			//"window: size=%dx%d, title='%s v%s'",
 			config.MainWindowSizeX,
diff --git a/ui/mainwindow/viewport.go b/ui/mainwindow/viewport.go
index e0f38c7..658519e 100644
--- a/ui/mainwindow/viewport.go
+++ b/ui/mainwindow/viewport.go
@@ -3,6 +3,7 @@ package mainwindow
 import (
 	"errors"
 	"fmt"
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
 	"lab.zaar.be/thefish/alchemyst-go/engine/fov"
 	"lab.zaar.be/thefish/alchemyst-go/engine/fov/precomputed_shade"
 	"lab.zaar.be/thefish/alchemyst-go/engine/gamestate"
@@ -94,7 +95,7 @@ func (vp *ViewPort) Listen(state gamestate.GameState) {
 
 func (vp *ViewPort) Render(state *gamestate.GameState) {
 
-	playerCoords := state.Controller.GetComponent(state.Player, types.Coords{}.TypeOf()).(types.Coords)
+	playerCoords := state.Controller.GetComponent(state.Player, ecs.CoordsComponent).(types.Coords)
 
 	vp.Move(state, playerCoords)
 
diff --git a/util/delenay.go b/util/delenay.go
new file mode 100644
index 0000000..c7d8682
--- /dev/null
+++ b/util/delenay.go
@@ -0,0 +1 @@
+package util
diff --git a/util/util.go b/util/util.go
index b7c80bf..152ca31 100644
--- a/util/util.go
+++ b/util/util.go
@@ -1,24 +1,32 @@
 package util
 
-import (
-	"reflect"
-)
-
-func InArray(val interface{}, array interface{}) (exists bool, index int) {
+func IntInSlice(needle int, haystack[]int) (exists bool, index int) {
 	exists = false
 	index = -1
-
-	switch reflect.TypeOf(array).Kind() {
-	case reflect.Slice:
-		s := reflect.ValueOf(array)
-
-		for i := 0; i < s.Len(); i++ {
-			if reflect.DeepEqual(val, s.Index(i).Interface()) == true {
-				index = i
-				exists = true
-				return
-			}
+	for i := 0; i < len(haystack); i++ {
+		if haystack[i] == needle {
+			return true, i
 		}
 	}
-	return
+	return exists, index
 }
+
+//left here for historical reasons
+//func InArray(val interface{}, array interface{}) (exists bool, index int) {
+//	exists = false
+//	index = -1
+//
+//	switch reflect.TypeOf(array).Kind() {
+//	case reflect.Slice:
+//		s := reflect.ValueOf(array)
+//
+//		for i := 0; i < s.Len(); i++ {
+//			if reflect.DeepEqual(val, s.Index(i).Interface()) == true {
+//				index = i
+//				exists = true
+//				return
+//			}
+//		}
+//	}
+//	return
+//}
\ No newline at end of file