The game is ocean based, your game character must survive and work up the food chain. Kick off your survival as a human and work your way up by evolving into more superior and tougher animals.
Make no mistakes, it is war without weapons. You must try to survive and grow while playing against other players who have evolved already in the server. Eat up to gain points and once your XP bar reaches maximum your character will evolve. Beware of bigger creatures as they can eat you up, and keep an eye out for your oxygen meter.
Simple controls here, just navigate with the mouse and hit the space bar for a boost when in flight.