No matter how big you are in Slither.io, you can eat or be eaten by your bigger or smaller opponents. Depending on the path you choose, you may encounter a dangerous snake or feed yourself to a snake. To defeat another player, you must make the snake's head hit your body. After the snake dies, all the food he eats remains on the map, edible by everyone, depending on the size. So eat as much as you can before a person is put on your hard work.