The goal of this game is to shoot down the airplanes fly across the sky using a cannon gun. The game consists of three game levels with differences in the number of planes, variations in speed, and initial value of health point. You will get score point if successfully shoot the airplanes or the bombs, if you missed to take down the airplane, you'll loosing health point. However you can gain the health point if you can achieve score 400 points or multiples thereof. You have to avoid contact between the bombs dropped by the airplane and the cannon, which causes the game to end.
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