Shoot torpedoes to any ship in sight while avoiding the islands

Controls:

Arrows/WASD submarine movement:

* W/UP: accelerate
* S/DOWN: desacelerate
* D/RIGHT: rotate clockwise
* A/LEFT: rotate counter-clockwise
* SPACE/CLICK: shoot torpedo
* Q/E: changes submarine mode (submarine, periscope vision, surface

Enemy ships move faster when the submarine is in the surface