The nature has its own rules – small are got eater by large and this how the food chain is built. You will find yourself on the bottom of this way when starting the game. As a tiny little mouse, you will find yourself some food, become bigger, and evolve in someone more powerful than you are. With every new step of the evolution, you will become a better fighter and your rivals will be beaten down by you. They are the real-life players, by the way!