This game has a really great mechanic that I haven't really seen before in a game. I like how you use hearts as a way to combine all of these different puzzle mechanics. From opening doors to shooting bullets, everything is connected. I'm surprised by the amount you are able to squeeze out of this one mechanic. My only main complaint is the amount of waiting that you have to do to heal, especially in the late game. Other than that, this game is excellent. Amazing work!