This is not a game. Do not ask for instructions. In this simulation, each creature has DNA, which determines factors such as speed and size, as well as behavior such as what action to take when food is to its right. Creatures that don't die of starvation may begin to look for a mate and produce offspring, which may be mutated.
I made this entirely myself. Was inspired by Bibites. Note that in the case the creatures become good at survival they may fill the screen and cause lag. They may also go extinct