Key Features and Benefits:Power-up featureShoot down four invaders of identical color to complete the Power-up Feature, causing a power-up item to appear. Completing the Power-up Feature repeatedly allows you to remain in a powered up state, making it easier to clear stages.Round featureComplete the Power-up Feature two times in a row, but with different colors (for example. 4 red invaders + 4 blue invaders), to perform the Round Feature, which causes a Flashing UFO to fly by. Shoot down the Flashing UFO to begin a Round.