You are alone, against swarms of marine monsters. Get ready for underwater rampage! Ever tried an underwater physics-based shooter? Jump into your yellow submarine, and save the rare plankton from hordes of hungry marine predators! Use giant bubbles and shockwaves, upgrade your equipment, send enemy shots back, push monsters into deadly whirlpools and more!
Click on the submarine and drag it around to move, or use the arrow keys. Shoot stuff with the left mouse button. Once you've bought these weapons, hold right ctrl to blow a bubble, or press right shift to launch a shockwave.