Refactor scene management, Enable wasd movement, Add level menu

Assets/Prefabs/GlobalBoostrap/UIManager.prefab

@@ -11,6 +11,7 @@ GameObject:
   - component: {fileID: 4618056563571998380}
   - component: {fileID: 410967918817466985}
   - component: {fileID: 8817541215649024317}
+  - component: {fileID: 7234731573259868655}
   m_Layer: 0
   m_Name: UIManager
   m_TagString: Untagged
@@ -65,3 +66,44 @@ MonoBehaviour:
   PressButton: 1
   UICanvases: []
   AngleDragThreshold: 1
+--- !u!114 &7234731573259868655
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