The player controls a laser cannon near the bottom of a single-screen playfield. Move horizontally beneath the alien formation and fire upward to destroy invaders before they reach the ground.

Levels progress through repeated waves with changing enemy patterns and increasing pressure. Players can use defensive shields for temporary protection, but enemy shots and descending formations gradually wear them down. The compilation format provides multiple Space Invaders-style variations rather than a large exploration map or character-based campaign.

Stay near the center when a wave begins so the cannon can respond quickly to both sides. Clear invaders from the lower rows first, because they create the greatest immediate threat as the formation descends.

Use shields selectively and keep moving after firing. Removing columns efficiently can open safer firing lanes, while controlled shots help avoid wasting opportunities during faster waves.