When I started to play, I was like "Oh, they didn't have time to put sounds", and then I saw that you needed to make them XD
This concept was very intersting, and seeing the game changing along the way was cool!
The only thing I would point out is that you start the level too close to the obstacles. The last level was almost impossible to survive at the start when you had to move 2 positions to the side.
Good job finishing this game in time for the jam! ^^