Really fun concept! It took me a bit to learn how to actually spin the submarine but once I did it was quite fun! I think the timer could've been a little longer and maybe making the level not be completely symmetrical would've made it more fun and maybe easier to orient yourself too. It was quite easy to get lost as to which way is up or down, but I'm not sure how to best solve this, maybe a 3d model of the submarine rotated accordingly at the bottom of your screen? Either way was quite fun and creative good job!