You have to eat the squared food to evolve and avoid the enemies so that you are not going to die. You move with the ARROW KEYS or KEY WASD. Press or hold the SPACEBAR to bite as long as auto bite is off. X to make it higher and C to make it 0. If the game is too hard then try it with an easier setting and visa versa for when its too easy(obviously). As a skill game, Evolution Squared can be found on www.flash-game.net. Have fun and good luck!