I love the aesthetics! The backgrounds are just amazing, and I really like how surreal the world is.
I feel like the platforming feels a bit clunky though. The character feels heavy, slow and floaty(even when he's not floating). I think I'd enjoy it more if the gravity was stronger and the player moved faster.
The floating mechanic is cool and could lead to some very interesting platforming. I think it would be nice if there were visual changes to the character when his floating time is close to ending. Maybe show the floating time bar close to the character?
I'll be looking forward to see more about this project!