I've really enjoyed my time with the game - but i do have a fair bit of feedback. I'll frontload the less positive so I can end on the highs! Firstly, performance. If you ever get to work on it any more, i think some optimisation would be really appreciated. It was super choppy, and, while I have a fairlyt old machine at this point, a game with these visuals shouldn't be anywhere near as taxing. As it's a school project in unity, though, i can definitely forgive that.
The voice acting is a nice addition, and i do like the characters. The script is pretty good, but I definitely think there's room for improvement. As with everyone else, for me the voices just stopped half way through, though as it's a school project, i get that sacrifices have to be made sometimes. The controls are pretty good, though it can be a LITTLE slow. If you were to speed it up, i wouldn't want it to be a lot faster.
I thought the camera shifts were a really good idea in terms of immersion, and i really loved the cockpit detailing but the mouse sensitivity was a little high, and I did get a little lost trying to move through the first skeleton formation - the environment made me feel like I should be able to move up to follow the passageway, but i was stuck to the same plane. As such it took me a little while to really get that I had to go through a side passage through the "ribs".
I did appreciate the little section that was inspired by Inside with the whole BOOM thing, but only as a reference that I got. In terms of something to play, it just took me out of the immersive experience, and stuffed me into something that just felt way too "gamey" when compared to what I has played before. I think some kind of health meter, or a more obvious visual indication of damaghe to the sub would have been good.
All that aside, I really, really enjoyed it. It has such a cool atmosphere, and is such a fascinating and creepy concept. I think my biggest takeaway from the game is that I would love to play a longer, more complete version of this, and the whole thing just oozes promise. I would be impressed if this had been made by someone with more experience, and i'm utterly blown away that you're all students. I loved it and think you've done a wonderful job!