Some savepoints would help. But I liked that the level was rotating from the center and you were traveling ouside of it, so it started easy, but became more and more harder over time. Liked the background a lot.

great job. but the game is kind of glitchy in physics 

Like the game but. I would have the level rotate around the player instead of the level rotating from the middle. Trap doors are evil and mean :(, I would only go through them if I try to go faster. Liked the art and the music