I'll start with the criticism, but before anything know that your game is AMAZING.
I encountered a few issues while playing, mostly that some platforms were almost invisible due to them being the same color as the background. I felt that the character controller could also use some work: jumping while going sideways limits your jump height, no coyote time, etc.
On the puzzle side, I had trouble timing everything on level 16, skipped it (thanks!), struggeled through 17 and quit at 18, but everything before was pure puzzling joy <3
Your mechanics are new and well implemented (which I imagine is no small feat), and the level design makes them shine even brighter: truly an incredible puzzle game and an outstanding jam entry.
Thanks for your game, and huge congratulations!