Your ships flies to the planet very rich in valuable resources. To colonize it is necessary to build a base and the alarm system in the form of guns. As long as you collect resources, you will constantly attack the enemies, who settled on the planet to you. Use the cannon to build defenses. Each girl has their own characteristics and the charge, which shoots. One can slow down the enemy, others bring it to shreds. Guns can be upgraded for the collected resources, thereby increasing the combat power.