I like the music and the animation style, but the jumping physics are difficult. I find myself having to play with two hands and mash the spacebar as fast as humanly possible.
Thank you for your constructive criticism. Could you elaborate further on why the physics are so difficult? Is the jump too low, too inconsistently high? Also, try pressing space every time the player touches the wall rather than mashing it, if you want to. That's how it was intended to be played, and maybe that gives you a better experience.