Interesting idea for a game, but the small viewscreen and unforgiving fall damage makes this more of a memory game than a platformer. Really, the way to solve this issue is either make the screen vertical, or give the player some way to look where they're jumping first.
I also seemed to be able to stick to walls, I'm not sure if that's intentional, but if you used it to make a wall jump that could also help to solve the aforementioned issue.