i love the idea and the art, very cute!
i will admit that i very quickly found a way to abuse the wall jump mechanic... the player is able to jump off a wall and fall back onto the same wall, which lets you scale vertical surfaces pretty easily. i'd consider nerfing it a bit, since most of the levels could either be cheesed or escaped entirely (out of bounds)
however, the intended solutions were a lot of fun too! the movement feels responsive and good, and the swapping was easy to get the hang of and used in interesting ways. good work!