the number on the top right is how fast on average the guys are. they will evolve using natural selection to survive. 1 food = survive 2 food = split into 2 3 food = split into 3 and so on when a new one is made it has a slightly different speed and it might help or hurt them. the warmer/redder they are the faster but less efficient. click on one to select one to see all there children and there speed.