I love how the levels have multiple solutions. The arccos like jump on second/third level is really high difficulty one, many people could probably not figure it out (combining jump with space). I also love how your game does not allow spamming gravity inversion, good designing.
Maybe making it a little easier would be great, at least for me, I do not like hardcore stuff, but I really like how clean your game is, allaround A, music would be a good bonus though, and preventing multiple identical sounds to mix that hard into ears :)