diff --git a/game.go b/game.go
index d88b645..c561917 100644
--- a/game.go
+++ b/game.go
@@ -25,13 +25,19 @@ type RunOptions struct {
 	Width               uint32
 	Height              uint32
 	ClearColor          Vec4
+	Resizable           bool
 	SetViewportOnResize bool
 	ResizeCallbackFunc  ResizeCallback
 	ExitOnClose         bool
 }
 
 // Main game object.
+// Setup will be called before the main loop and after GL context has been created.
+// Update will be called each frame. This can be used to switch scenes or end game on win state.
+// For game logic, System should be used.
 type Game interface {
+	Setup()
+	Update(float64)
 }
 
 var (
@@ -92,6 +98,10 @@ func Run(game Game, options *RunOptions) {
 		exitOnClose = options.ExitOnClose
 	}
 
+	if options != nil && !options.Resizable {
+		glfw.WindowHint(glfw.Resizable, glfw.False)
+	}
+
 	wnd, err := glfw.CreateWindow(int(width), int(height), title, nil, nil)
 
 	if err != nil {
@@ -106,6 +116,10 @@ func Run(game Game, options *RunOptions) {
 			SetViewport(0, 0, int32(width), int32(height))
 		}
 
+		if activeScene != nil {
+			activeScene.Resize(width, height)
+		}
+
 		if options != nil && options.ResizeCallbackFunc != nil {
 			options.ResizeCallbackFunc(width, height)
 		}
@@ -128,6 +142,8 @@ func Run(game Game, options *RunOptions) {
 		clearColor = options.ClearColor
 	}
 
+	game.Setup()
+
 	// start and loop
 	log.Print("Starting main loop")
 	delta := time.Duration(0)
@@ -148,8 +164,11 @@ func Run(game Game, options *RunOptions) {
 
 		if !math.IsInf(deltaSec, 0) && !math.IsInf(deltaSec, -1) {
 			updateSystems(deltaSec)
+			game.Update(deltaSec)
 		}
 
+		CheckGLError()
+
 		wnd.SwapBuffers()
 		delta = time.Since(start)
 		deltaSec = delta.Seconds()
@@ -220,11 +239,13 @@ func initGoga() {
 }
 
 func cleanup() {
-	// cleanup scenes
-	log.Print("Cleaning up scenes")
+	// cleanup resources
+	log.Print("Cleaning up resources")
 
-	for _, scene := range scenes {
-		scene.Cleanup()
+	for _, res := range resources {
+		if drop, ok := res.(Dropable); ok {
+			drop.Drop()
+		}
 	}
 
 	// cleanup systems
@@ -234,12 +255,10 @@ func cleanup() {
 		system.Cleanup()
 	}
 
-	// cleanup resources
-	log.Print("Cleaning up resources")
+	// cleanup scenes
+	log.Print("Cleaning up scenes")
 
-	for _, res := range resources {
-		if drop, ok := res.(Dropable); ok {
-			drop.Drop()
-		}
+	for _, scene := range scenes {
+		scene.Cleanup()
 	}
 }
diff --git a/res.go b/res.go
index 9adee5a..c542164 100644
--- a/res.go
+++ b/res.go
@@ -3,6 +3,7 @@ package goga
 import (
 	"errors"
 	"io/ioutil"
+	"log"
 	"path/filepath"
 	"strings"
 )
@@ -44,6 +45,7 @@ func AddLoader(loader ResLoader) bool {
 	}
 
 	resloader = append(resloader, loader)
+	log.Print("Added loader for " + loader.Ext() + " files")
 
 	return true
 }
@@ -54,6 +56,7 @@ func RemoveLoader(loader ResLoader) bool {
 	for i, l := range resloader {
 		if l == loader {
 			resloader = append(resloader[:i], resloader[i+1:]...)
+			log.Print("Removed loader for " + loader.Ext() + " files")
 			return true
 		}
 	}
@@ -69,6 +72,7 @@ func RemoveLoaderByExt(ext string) bool {
 	for i, l := range resloader {
 		if strings.ToLower(l.Ext()) == ext {
 			resloader = append(resloader[:i], resloader[i+1:]...)
+			log.Print("Removed loader for " + ext + " files")
 			return true
 		}
 	}
@@ -79,6 +83,7 @@ func RemoveLoaderByExt(ext string) bool {
 // Removes all loaders.
 func RemoveAllLoaders() {
 	resloader = make([]ResLoader, 0)
+	log.Print("Cleared loaders")
 }
 
 // Returns a loader by file extension.
@@ -130,6 +135,7 @@ func LoadRes(path string) (Res, error) {
 	}
 
 	resources = append(resources, res)
+	log.Print("Loaded resource: " + res.GetName())
 
 	return res, nil
 }
@@ -138,6 +144,7 @@ func LoadRes(path string) (Res, error) {
 // If a loader is missing or fails to load the resource, an error will be returned.
 // All resources will be kept until an error occures.
 func LoadResFromFolder(path string) error {
+	log.Print("Loading resources from: " + path)
 	dir, err := ioutil.ReadDir(path)
 
 	if err != nil {
@@ -185,6 +192,7 @@ func RemoveResByName(name string) bool {
 	for i, r := range resources {
 		if r.GetName() == name {
 			resources = append(resources[:i], resources[i+1:]...)
+			log.Print("Removed resource: " + r.GetName())
 			return true
 		}
 	}
@@ -198,6 +206,7 @@ func RemoveResByPath(path string) bool {
 	for i, r := range resources {
 		if r.GetPath() == path {
 			resources = append(resources[:i], resources[i+1:]...)
+			log.Print("Removed resource: " + r.GetName())
 			return true
 		}
 	}
@@ -208,4 +217,5 @@ func RemoveResByPath(path string) bool {
 // Removes all resources.
 func RemoveAllRes() {
 	resources = make([]Res, 0)
+	log.Print("Cleared resources")
 }
diff --git a/scene.go b/scene.go
index c732dd8..594624d 100644
--- a/scene.go
+++ b/scene.go
@@ -1,9 +1,16 @@
 package goga
 
+import (
+	"log"
+)
+
 // A scene used to switch between game states.
 // The Cleanup() method is called when a scene is removed
 // or the program is stopped. It can be used to cleanup open resources
 // (like GL objects).
+// On switch, Pause() and Resume() are called.
+// The name returned by GetName() must be unique. A scene must only be
+// registered once.
 type Scene interface {
 	Pause()
 	Resume()
@@ -19,6 +26,7 @@ var (
 
 // Adds a scene to game.
 // Returns false if the scene exists already.
+// The first scene added will be set active.
 func AddScene(scene Scene) bool {
 	for _, s := range scenes {
 		if s == scene {
@@ -27,6 +35,12 @@ func AddScene(scene Scene) bool {
 	}
 
 	scenes = append(scenes, scene)
+	log.Print("Added scene: " + scene.GetName())
+
+	if activeScene == nil {
+		activeScene = scene
+		log.Print("Active scene: " + scene.GetName())
+	}
 
 	return true
 }
@@ -38,6 +52,7 @@ func RemoveScene(scene Scene) bool {
 		if s == scene {
 			s.Cleanup()
 			scenes = append(scenes[:i], scenes[i+1:]...)
+			log.Print("Removed scene: " + scene.GetName())
 			return true
 		}
 	}
@@ -52,6 +67,7 @@ func RemoveAllScenes() {
 	}
 
 	scenes = make([]Scene, 0)
+	log.Print("Cleared scenes")
 }
 
 // Finds and returns a scene by name, or nil if not found.
@@ -73,6 +89,7 @@ func SwitchScene(scene Scene) {
 	}
 
 	activeScene = scene
+	log.Print("Active scene: " + scene.GetName())
 
 	for _, s := range scenes {
 		if s == activeScene {
diff --git a/test/gopher.png b/test/gopher.png
deleted file mode 100644
index cb5e2e1..0000000
Binary files a/test/gopher.png and /dev/null differ