I think it is great, that you tried out a unique movement system for the player. I love movement based games, where you really have to master your inputs to get good. Furthermore, I don't think the game is hard once you master the movement, but in my opinion it is missing some easier tutorial levels.
I know difficulty is hard to balance, but generally speaking it is more fun to play some levels you can complete easily while learning the mechanic, rather than dying dozens of times until you master the movement. (I could be completely wrong, too, and maybe you are going for that "Getting over it" difficulty-mastery style.) This is just my personal opinion, but maybe it will be worth it, if you give the difficulty balancing another shot.
Overall a cute and fun game. Perfect for a game jam!