I love how tense it can get in this game, even if it is turn-based! It's always satisfying when you manage to solve a puzzle with only 1 oxygen left, and if you added some sort of alert or siren to warn you I think it'd help make it even more exhilarating. The mechanics were nice and simple as well, which made it easy to understand what to do and not get confused, so good work on communicating those ideas. The graphics were lovely, and the 1-bit style was very charming, and still managed to keep everything clear and readable. I liked the sound design too - those little bubble noises added a good bit of atmosphere to the game. Overall a fun little puzzle game, great work!