Yo here from the discord server, leaving comments here so you got all in one place:
As other mentioned yeah, could use some more clarity on the tooltips for controls but also I think it was fun to do some player discovery myself.
Aside from that, and this is a note for improvements giving the time contrains of a jam, I would love some planning on tilesets to be able to identify faster my size to where I can sneak through ratio. Just some corner work with some coding (communicational, not programmatical) that allows me to see faster which direction I should be using my sizes to solve the level.
On the positive side the passing through mid jump/falling to scale to destiny was VERY well managed, gave me a sense of challenge and satisfaction worth of keeping playing a few levels more! Me thinks it's here where you got the meat of your design, where is more focused on player agency rather than designer assumption.
GOOD JOB TEAM!