I'm a little biased because I love anything to do with the abyss or deep underwater setting. I'm actually working on a game that's up on Steam to Wishlist, that deals with the setting being underwater!
With that being said, I love the art style, l enjoyed the setting a lot. Nice play on being fish also the mechanics worked great. I could definitely see this being a cool full-fledged game with additional features. in terms of the game jam, this was a really cool submission! Great work!