Arrow keys, no WASD. Collect the yellow food to grow. Don't hit the edge or the dangers(red squares). If you collide with yourself, you will also lose. There are power-ups to collect, look at the symbols. Power-ups: Invincibility: Makes you not be able to lose for 6 seconds. This power-up looks like your head with eight lines around it. More food: Doubles the amount of food on the map. Looks like two yellow squares. Magnet: Allows you to collect food from farther away.