I'm glad you liked the aesthetics, this was my first time trying a PS1 style. It was actualy more based on Space Hulk: Vengeance of the Blood Angels, what with the cramped corridors, (space)ship wreck exploration and eerie atmosphere. And I'm glad you liked the talking corpses, I actually cribbed that idea from Bungie's old FPS Pathways Into Darkness, albeit in a more stripped down fashion.
You're absolutely right about the combat. I didn't have time to make hit reaction animations, so the only damage cues are the blood puffs (which are hard to see because the enemies just keep moving forward and block the view of them), and a small flesh stab sound effect. That's why the Children just disappear when killed.
Yeah as I mentioned in another comment I don't know of many other underwater dungeon crawlers. Only one I knew of was certain sections in Legend of Grimrock 2. It was actually more inspired by the diving sections of a game called Northern Journey, which for a non-horror game was about 10x creepier than mine lol. I had thought of adding the six degrees of movement, but having had the past experience of not finishing a game for this jam I decided to scope down.
Thanks for playing, and the feedback!