Try to shoot down all the bombs before they hit the ground. A cannon will shoot the bombs into the air. Move your mouse around until the crosshairs is on a bomb, and then click to shoot. The black bombs only take one hit to destroy, but the red bombs take two hits. Try not to miss, as every miss will take away points from your score. If you make it far enough, extra cannons will be added, making it even more difficult. Once a bomb has hit the ground, your score will be tallied. Your misses are subtracted from your hits, and then your accuracy percentage is weighed up to give you your final score.