This is awesome! Really fun mechanic. I like how you fully explored how all the different systems interact with each other (i.e. the dart trap can be used to kill enemies or also press buttons.) It’s a little on the easy side but I’d rather that than it be annoyingly difficult. I think it would be nice if the player needed to get to some exit area with the key in hand so that there was a bit more continuity between levels. Great work on this. My game is linked below if you want to check it out.