Few things that come to mind are-
1. When I jump off a rock, I expect it to go straight rather than slowly curve and fall down (SPACE!)
2. When I jumped while my character was directed at another rock, the jump direction was slightly off from the start of the jump. (If you are executing the jump mechanic in the local "up" direction of the player, instead of that, you could try measuring the rock and player positions in the world to direct the jump direction away from the center of the rock.)
3. The level needs to be better visible- allowing me to see where I have to go and where I can go.
Overall, it's a nice concept and requires further polish to make it more enjoyable. Nice work, though!