There's a lot of neat stuff in here!
-The timing puzzles for flipping the first switch were really neat and you definitely caught me unaware a few times and I got smashed to bit LOL
-The camera work snapping to show the door opening was really nice, it's neat that you have a cutscene system like that
-underwater movement controls feel great
-the environmental mood/vibe was really cohesive and was well-established
-Combat was REALLY tough, I tried to kill the big whale/shark? but got absolutely destroyed. A checkpoint would have been useful before that fight because I got demoralized after a few attempts. But I see what you're going for, and it's an engaging system
Great work and congrats on submitting!