Finally I met someone who uses the same idea!:) Still, we have different vibes for sure. I feel that your game is a rage game, like "Cat Mario" or "Mr Karoshi". And you have many small levels, witch is a good choice for this "fast" type of game. My general suggestions are:
1) Improve the graphics a bit. It may not be important for this type of game or for a jam game, but there is a separate category in the rating for this.
2) Improve the controls. What I tried to do before the actual implementation - make all platformer mechanics work well. Because before you make a "platformer with a secret feature (dying instead of winning)", you should make a good platformer at first. Now the controls are a bit hard to get used to, and it seems there is no coyote time.
I think that's all about it. I really liked your implementation, great job, man!