I think the start of the game was bugged for me and I didn't know what the controls were (looked like it was bugged out on the waterfall). Eventually I figured out the movement controls. The only thing that was painful was making a jump that transitioned screens, it was too tricky since I couldn't see where I was going and would have to blindly and quickly try to react in time. Reset would have been nice too like others commented.
Overall, pretty neat concept for a jam game, mostly self explanatory / intuitive.