Awesome idea! You made a lot of levels to exploit a very gimmicky mechanic and that's awesome! One complaint id have about gameplay is that it isnt clear that for movement health only depletes once youve let go... I was stuck on a level for a while before realising that. The art is nice and simple, though Im not the biggest fan of the door. Could be nice to give the option to remap a key that's already mapped, could lead to some more interesting levels too. Music is a tad repetitive. All around a pretty solid submission!