The art and music in this game are great and the levels are well designed. I just feel like the controls are a bit stiff but other than that good job on the game :D

Fun idea and very charming visuals as well! I like these kinds of physics-based platformers a lot and could probably get stuck playing this for hours if I gave it some more time. My only gripe is that the controls feel a bit unresponsive; I sometimes had to press the key three or four times in rapid succession to jump or freeze in place.
   An expanded tutorial could maybe help get players going faster, but to me a big part of the fun in these types of games is simply messing around to see what you can do. Perhaps having the first section be a big playroom without any enemies could make the game easier to get started with? Maybe even have some drawings on the walls showing off some of the different moves you can do, because I feel like you could do some absolutely insane stunts in this game with some practice.
   The rubber band itself definitely feels right. It behaves exactly the way I'd expect from a real rubber band, and I can tell that you could really gain some serious momentum with the right timing!