Use your finger to tap the bottom of the screen which will launch a ball with a specific color that needs to match the color of the line at which it is launched. Tap in quick succession to add more time so you don't run out and to fill up your special ability bar. Once the bar is filled, you will have the option of using a special ability that hurls forth a black ball of fire that completely busts through the entire line. Continue to tap your way through the fun-colored and challenging levels.