Hello! Nice game, although I don't know if I got very far, I would say I enjoyed playing your entry. The first thing I noticed was that the game kept crashing every time I touched an enemy, but hey, I guess that's one way to do a death mechanic. I also thought the dialogue was pretty fun and I enjoyed the section where you have to climb the wall using the bubble and the rock, although I didn't find if there was any other use for it.
I also got softlocked a couple of times at the bottom of the map(?) where the only way forward was through a tight corridor with an enemy and some spikes in the ceiling, and my jump was not high enough to get out of there, so the only way out was death.
A couple of other critiques I would have are that I really did not have any idea where I was supposed to go in the game, so some direction in that would be great and although the controls felt pretty good otherwise, jumping out of water felt pretty clunky and the jumping and gravity are a bit too fast for my liking when you are out of water. A minor nitpick I also have is that the sound in the section with lots of bubbles can get quite loud.
Regardless, the game was fun enough for me to keep trying after a couple of deaths and I thought the pixel art and animations were good and the double-oxygen meter mechanic was unique and has potential if expanded upon. Maybe it could work if the gameplay was more different when out of water versus in water?
Anyways, nice entry!