Neat little game! I especially like the movement of the submarine and how it still retains some motion and spin after you stop moving. If you decide to update it, it would be nice to see some different enemies or environmental hazards, and if the game space was a little bigger it might play better because it feels sorta cramped. I'm working on a shooter with somewhat similar controls called Shmooblin Blaster, Its more of a boss rush game but if you wanna check it out and leave some feedback I'd appreciate it!