Cool idea, but i've got stuck on the tutorial, after punching the F block and getting the box, I couldn't make the jump to the other side, the idea for the mechanics is nice, just that I think you should work on the difficulty curve, also when pressing R, i expected for it to reset the boxes aswell. Also I recommend adding a physics 2D material to the player, with friction set to 0, that way the player won't get stuck on walls, would make platforming feel better