Moon Cresta (???????) is a fixed shooter arcade game released in 1980 by Nichibutsu. The player begins the game with a small spaceship armed with a single laser cannon. After successfully completing the first four waves of alien attacks, the player must attempt to dock his ship with the next 'stage' of the ship. This second stage has two lasers in addition to the original one. Each docked stage is one of the player's "lives." (wikipedia.org)