submarine theme and the context about being in a dangerous mission is really cool but game jam games normally prioritize gameplay unless the focus of your game is the story.
feedback of what is happening is important. enemy bullets spawn next to me, sometimes right on my position so i get hurt without any chance. and, i cant tell when im able to shoot or even on who i should shoot.
idk what happens when you survive cause i always die but some variation would be great.
cool idea and game!