I finally reached the ending of this game and my vision is still spinning /lh.
Pretty sick game, I like moving the submarine after learning how to do things :)
I'm not sure if it was intentional or not, but I couldn't seem to fix the ballast tanks and had to fight with them the entire run. But it does put some more stress onto keeping your submarine afloat because of the constant back and forth from the screen, back down to slow your speed back down, to the right to spin the wheels, etc.
I still think it was fun though and got super excited when the cutscene started to play.