Well i figured out what the red one does :D The game is simple but fun. Maybe instead of intant velocity we could add force to our ball to make it more chaotic to control that would be more fun i think :d
I think you already know that but sound effects would make this game better.Also some kind of particle effects when winning a level or dying can make the game feel alive.
Overall it was fun playing this nice job :D
Note : I would be happy if you could check out m ygame as well :d