The game uses a fixed screen presentation with the player positioned at the bottom as the operator of a ground-based cannon. You can rotate the gun left and right and fire straight upward to shoot down aircraft before they pass overhead. Enemy planes may drop paratroopers, who descend and then crawl toward the cannon from both sides after landing. As stages progress, enemies appear faster and in larger waves, including bombers and more frequent troop drops. Surviving depends on quick target priority, steady aim, and preventing too many enemies from gathering near either side of the gun.

Focus on enemy planes first, because every surviving aircraft can create more ground threats by dropping paratroopers. Try to keep the airspace above the cannon clear before switching attention to crawlers on the ground. If both sides start filling up, prioritize the side that is closest to reaching the loss threshold. Short, controlled shots are usually safer than wasting fire while over-rotating the gun.