Honestly, it's a good concept with all the movement mechanics you have but I have a couple of critiques. I got to the platforming area with a buncha rock spires after crossing the second bolder that fell and then got stuck in a rock before I could finish lol.
Firstly, holy shit it's 2 gigs, that is WAY too big for a game jam, and it used a lot of my computer's memory in the process too. Not sure what you're doing but you really need to figure out how to optimize your game a bit better going forwards, especially if you want to make a bigger game.
The movement was a bit buggy. Like I said before, I got stuck in a rock while trying to climb it. The climbing mechanic is by far the buggiest, at least visually, and you should probably go back to workshopping that. The level design also is way too difficult, especially with the precision of jumps you're asking of players. One or two like that at the end would be fine, but I seriously spent a minute or two just trying to clear the tutorial rocks. I will say though that I did enjoy the bolder falling sections, both in getting them to fall and then figuring out how to get on top of them once they did. The sliding mechanics also were nice, if not underutilized, and I couldn't figure out how to toggle sprinting (or maybe I just tricked myself into thinking there was sprinting? not sure)
Love the environmental design though, it felt natural and game-y all at once, and I think if you spend more time focusing on these mechanics to refine them then you could get something good.