The ship went to space with a clearly set goal - to find and pick up oblong crystals. One day one of them was accidentally brought to Earth and it turned out that this is a very valuable stone that can be used in almost all industries. It is a source of energy, if you pound it into powder - an effective universal medicine. In general, earthlings have found an almost magical gem in their properties, but it was not easy to get it. The pebbles float in an airless space and are protected by alien creatures on flying saucers. Destroy the enemy with weapons on board is impossible, you will have to dodge meetings with enemy starships in the game Saucer Dodge, collecting stars and crystals.