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Save the world from alien invasion. You appear in orbit in the cockpit of a large cannon spewing tons of ammunition against enemy planes. You can't move anywhere other than around planet Earth in a clockwise/counterclockwise direction. However, the enemies don't fly straight at you, but in circles and with each turn they make, they get closer to you. Fortunately, very slowly, so you have enough time to shoot them all. But be careful, the longer you last, the more the airstrikes escalate and after a while lasers will start shooting at you, which, like a collision with a plane, will deprive you of one of your three lives. |