Hey that was a lot of fun! I had an issue where my camera would constantly rotate in random directions probably because of mild stick drift on my controller. I've never noticed the stick drifting in any other game so maybe adding tiny deadzones for controller would help? Didn't stop me from completing the game though.
constructive criticism (nitpicks): Everything in this game "works" for me, as a jam game this is pretty rare so big ups for that.
I think the visuals are very charming at first but get a bit bland towards the end as it is very samey and flat (specifically the environment, characters are cute as hell). I think maybe working with different shapes a bit more would give it a lot more interest. You did that at the beginning with the pillars they stand out more than the flat bocks we get later on in the main portion.
Gameplaywise it is very good. Mechanics are introduced one at a time with their specific little puzzle challenge it's all very smooth. the only downside of that is that the game is very short. The only movement specific thing that i would change is making it so that charging the big jump doesn't stop you right away, like maybe do a little slide while you charge Mario64 style, it would just help the movement flow a little better.
but those are very small issues and that's it really! Good job :D