You are locked in ferocious combat on an interstellar battlefield. Dodging and taking aim, alien rocketships stream past, circle, and attack. There are too many to count! Fire, fire, fire! The enemies' first wave is repelled. A moment's rest, and the attack begins again. Gather extra life and firepower from floating energy cells. Prepare to duel batwing fighters and insect spaceships, avoid churning energy fields, alien cruisers and more!