This seems not like a game made in 14 days (based on how polish the game is, if it is then you are a very strong and experienced developer) and the connections with the theme is very unclear since you have also mentioned it in your creative statment.
Several feedbacks from my own play experience:
1) There will be more fun if you have a coop mode. one guy reload and shoot torpedo, one guy try to read and deduct info from radar; besides, considering how narrow the space is in a submarine ppl also have to corrdinates their moving in it.
2) Have a hard time to memorize what kind of shape of each screen is for detecting hostile ship.
3) No feedbacks when I launch the torpedo it would be good if I can see its track on the launch screen