Thanks for making this game! I liked the puzzles- great level designs!
Here is some constructive feedback, hopefully it is helpful!
Feedback:
-switching animation looked weird with some strange lines in the animation. Try looking into a pixel perfect camera, that might help (Could be wrong though, I'm no expert)
-controls were hard to get used to, but I managed- if they are flipped, try inverting the directional velocity as well- that could help!
-It might be a tough system (I did not perfect mine), but look into making it so you cannot switch if you will switch inside an object.
-maybe changing up the music in some way- agreed that it is not 100%
Overall, really cool game!