Really a fun concept and good execution. I had a couple points though.
I found a bug where if you jump up to the corner of a platform and then jump again right as you hit it you can initiate a super high jump. It was pretty easy to reproduce and actually kinda fun but I don't think it was intended.
There was also some visual artifacts in the lights for some levels. The shadow the player casts is really cool, though it looks box shaped.
Overall a really neat game.