diff --git a/manager.go b/manager.go
index 1c722a8..8bcb83b 100644
--- a/manager.go
+++ b/manager.go
@@ -47,18 +47,16 @@ func NewManager() Manager {
 	}
 }
 
-// ebitengine update proxy
-// manages scene transition and exists, then calls scene's update method
+// ebitengine update proxy on behalf of current scene
 func (m *Manager) Update() error {
 	if m.currentScene == nil {
 		return nil
 	}
 
-	//call the current scene's update method
 	return m.currentScene.Update()
-
 }
 
+// shutdown application
 func (m *Manager) Quit() {
 	os.Exit(0)
 }
@@ -114,10 +112,12 @@ func (m *Manager) SetCurrentScene(sceneId uint) {
 	m.currentScene = m.scenes[sceneId]
 }
 
+// handle scene transition
 func (m *Manager) TransitionScene() {
 	m.SetCurrentScene(m.nextSceneId)
 }
 
+// set new sceneId as the successor
 func (m *Manager) SetNextScene(sceneId uint) {
 	m.nextSceneId = sceneId
 }