Destroy the Star Castles!
The alien armada has deployed automated outposts around our solar system, as a prelude to a full-scale invasion. Space Command has dispatched you to destroy these outposts, but this is easier said than done: These fortresses are surrounded by energy shields and guarded by space drones. Watch out for the energy cannon that can destroy your ship in an instant!
Controls - Arrow keys (up, down, left, right) and Z and X for the buttons. Q starts most games, but unsure of the difficulty. The numbers don't work in this online emulator.