Cool concept! I really like the idea and design.. It was quite difficult for me, but no worries, I'm terrible at this (and don't have the nerve) :D
Just one bug happened to me. I think it was only in the first level (because it took me a while to look at the controls and discover there is a sprint option - maybe consider some pop-up at the start of the game with controls for stubborn players like me :D ).
Anyway, the bug. Sometimes I tried to move, but the character didn't move, only played walk animation. I had to jump to move again. Seemed like some problem with collider or such. Not a big deal, but happened a few times.
But as you have written in your faq., I can imagine this to be a full game. It would be blast, especially if you added some thematic music,
Good luck in future development.