Aaaah! Jellyfish!!!

The Game - Giant mutant alien jellyfish have taken over the Earth's oceans and there's only one person who can stop them. Unfortunately, the jellyfish ate that fellow while he was sunbathing at his beach house, so now it's up to you. Take control of a super-advanced submarine and try to wipe the scourge off the planet! Are you catching the sarcasm here?