I really loved the music and animations, they were super charming! I really struggle making things look good with minimal art, I don't know why or how, but you really pull it off well!
Made it to the end with score of 92 but 26 deaths. I am sooo thankful you put in checkpoints, it would have been rough without them! Something is off with the blob jump, I'm not 100% certain what it is but it felt like if you tried to jump when it was near the top of the motion arc, it wouldn't actually jump. Initially I was thinking it needed coyote time (which every platformer should have, letting you jump even if you've fallen by a frame or two) but it was still an issue when jumping over spikes, I would come right up to them, stop, then jump.
Making the spike creature collision a hair smaller would be nice, I really struggled as the bird to make it over the one where I had to descend quickly because of the ceiling spikes. Celeste and other games frequently have hazards with smaller collision than the visuals because it feels way better and less unfair since an animation can make it feel like you didn't contanct.
Definitely wanted gamepad support, it's pretty easy to add but I still enjoyed it, keep it up!