|A vertically scrolling shoot-em-up in which the player pilots a bi-plane and must destroy enemy land, air, and naval craft across a variety of environments.|
Some enemy aircraft waves produce bonuses when shot down, such as weapon power-ups, point bonuses, and extra lives. Each stage begins and ends with an airport runway and every time the player lands on a runway at the completion of a stage, the amount of remaining player bombs are multiplied by 3,000 points per bomb and added to the player's score. All bombs are replenished for the start of the next stage.
Game description from www.arcade-history.com