Ok this is a very good entry, I really love it. Incredibly polished for the parts that's meant to work. I did find there was still some platforming collision problems in the normal mode though, so maybe you could look into that.
Art is incredibly good. The modes I like best was the funky physics one where the walls just go flying when I also enabled flip gravity, and that's just among the ones I have tried. I have only able to get around half the achievements. The online game one was really difficult to get lol.
The music captures the vibe perfectly and elevated the whole experience. Overall this is one of the best entries I have played so far this jam yet! Great job!