A nice little game.
I think you may have messed up the character controller a bit. The forward and backward directions seem to be reversed, and I’m not sure if it’s intentional but the character is clipping through the floor. The way the character turned felt a bit awkward but I think would have been fine had the directions not been mixed up.
That being said I liked the idea of the collectibles giving you increased jump height, such that you have to consider the order in which you can get them, and the environment was fun to explore. Good work overall!