Joining functions together in a key an interesting idea. I like the abstract environment too.
I think that making the player hard to control makes the game more challenging, but it can get frustrating pretty quickly. The levels that are in this game are similar to what you can create in a normal platformer, except that the controls made it harder. It is not fully utilizing the potential that you've created. The title music is also a bit sharp to the ear.
All in all, I think it's still a great platformer. Great job on the jam!