You want to explore the deep blue but pesky sea creatures want to destroy your submarine. Good thing your propeller is equipped with a gun! Blast those sea creatures away and reach the deepest depths.

Use the arrow keys to shoot behind you, use the knockback to dodge the obstacles, or switch to inverted controls and chose the direction your sub will move.

You can press x to switch between a fast straight spray with little knockback, and a huge cone blast propelling you across the screen.