cool game man! i had some struggles in level one with the section where it looks like you're supposed to become water to get under a low ceiling. once i pressed the button to become liquid, the game took all control from me and i couldn't even reset the level.
i really like the concept you have though; this is a very unique approach to a platformer. it feels like something could be very speedrunner friendly eventually. the graphics for your main character are also super charming!