Overall I really liked the graphics and application of the theme! It's a fun little game!
My only criticisms are that:
The jump sound effect was a bit too high pitched and loud. I ended up muting the game to finish playing because it was just too annoying for me after a couple minutes.
While the trippy effects were really cool, I'd have liked them to be bit less intense and put more focus on effecting the controls rather than making the player dizzy with upside-down graphics. I understand you were going for something disorienting but I think a bit more moderation in that dimension would lead to more fun gameplay.