Nice arts, although very simple and very good visual effects. I like the sound effects too, but without pitch shifting it got a little tiring. The music is fun to listen to at first, but after a while of playing, I found it to be a bit mismatched from the game vibe.
As far as platformer controls go, I think it needs some more tweaking as well. I found the character to be too slippery in a game full of 1 tile precision jumps. The mechanics are innovative though, so I like that. Another feedback is that I think the explanation of the mechanics in level 0 is still also a bit confusing for me, so maybe you can rewrite it a bit.
Overall not too bad an entry, but some extra polish could go a long way.