Nice! Very tricky. As others have said, the collision could be better: the hitboxes on the spikes feel a little too big, and it would be good to have some visual indication that all sides of the spike blocks are deadly.
Being able to press 'R' to restart would have been nice: I had to go to fullscreen mode because the game didn't fit on my screen otherwise, but then pressing Escape would quit fullscreen. So to restart, I had to hit Escape twice (exit fullscreen, then restart the level) and then click the fullscreen button again. I did eventually find a way to scroll my screen just right so I could play without needing fullscreen, but...
But yeah, a nice little puzzle. Kind of like some of the puzzles in The Swapper. And the art is cute.
--Josh (part of teamwintergreen for the jam)