The origin of these chomp games is in eating a chocolate bar. Square by square the bar gets eaten. That’s exactly how it goes in these games. Shut off pieces of the screen. You can do this by eating pieces of the screen, cutting pieces of by drawing a line or change the color of the screen, piece by piece. Avoid certain objects or lock them up. In most of the games you need to shut off a certain percentage of the screen to go to the next level.