Move your mouse pointer around the screen, you player will go to it. Eat little dots scattered around the keyboard to get bigger. If you are bigger than another player, move your character over them and eat them. When you eat someone there size adds on to yours. When you enter the game, you will be any color. If you see someone named Pixel_Crafter that is constantly changing color, that is the creator of this game, me! If your game is running slow, press shift and click the green flag. When done it will take a few seconds to reboot.
