Wow this is something else for a two person team sub, kudos!
Really liked the customize feature and the care for letting pick bosses, easier to rate the design, felt the second one should had been the first 1 (difficultywise) but that could just be me.
Also loved the aesthetic and I think the soundtrack fit the game well, I believe the music sound slider may not always work.
Well great job, had fun and will go back to it in the future, take care :3