Great allegory of game development with some very surreal imagery.
The only thing that bugged me a bit was the controls. In the platformer phase I thought that the gravity could've been stronger as the character was floating in the air too long. Also I was sticking to walls during jumps.
Also during the maze phase I was able to collect the required coins just in the bottom half of the map, so I felt that the top half was a bit wasted (the player doesn't have to explore that part to progress).
That being said this game is very innovative. This is how all narrative-based games should be!