My goodness, that must be one of the most polished game of the jam!
I personally think you spent way too much time on the title screen. I mean c'mon, a lot of commercial games on steam don't even look that good...
It even have an animated instructions to teach the player the controls... and look how cute that character looks! ^o^
Ok, joking aside, the game sounds and looks fantastic!
On the bad things, I have to say the game is too much punitive for my taste and it feels to hard straight from the beginning. Maybe I'm just bad, but hitting the "spinning" button when you're on a donut to double jump seems... yeah too hard, I keep missing. Maybe it needs to be more forgiving when you enter the trigger, either by making it bigger or allowing to still make the just for a few more milliseconds after exiting the trigger. Or maybe I just sucks at platformers 8-)
Still, great works!