Great game! I love its visuals and audio, also you nailed the theme!
Jump and movement needs to be tuned a little in my opinion, but this doesn't prevent the game from working well. I enjoyed the platforming, and the difficulty seemed just right to me.
The core idea of the game doesn't entirely convince me. Essentially, the player chooses one level and skip another one each time, and the two paths never intersect. Even though there's the possibility to enter the doors that weren't chosen in the end, I personally was not encouraged to do so. It's a shame, at least from my point of view, to encourage to play only half of all the level design work that has been done.
Overall it's a fun game, very well implemented! Good job! ^^