Very clever concept. Was very confusing at first and took awhile to even start, but it got easier to do as the game progresses. Some levels can be done by just quickly removing and reinserting the commands (insert walk, remove when about to hit spike, jump+walk over spike, repeat) when needed which kind of feels like cheating the puzzle aspect a bit. Kinda weird platformer + puzzle game but it's a very nice game, albeit confusing at first.