You are a turtle trying to get to the beach to lay eggs! ...But you aren't the only turtle. Many turtles bigger than you are competing for the beach! If you touch a turtle bigger than you, you lose. If you manage to survive for thirty seconds, you win!
There is a trick to this. If you eat turtles who are smaller than you, you grow larger in size, giving you the power to eat the next biggest enemy! ...However, you lose speed and are more vulnerable to the even larger turtles. It's a trade-off between agility and dominance. Very tricky indeed!