Nice! I found the normal mode a bit too easy (can be cheesed [pun intended] by scaling in a spiral, always to the left or to the right) and the hard mode a bit too punishing.
Maybe something could do done about it, like adding obstacles other than boulders or floors that have restricted climbing of something. Of course, I understand that for a jam game that is additional content and mechanics that is hard to fit in the allocated time. Other than that, nice jam game!