The object of the games is to clear all the screens of the invading Space Nasties by manoeuvring your ship across the solar base and "bumping off" those you're unfortunate enough to encounter. The Bad Guys take many forms, and they're a hostile lot who don't like being knocked around any more than you will. As you will discover some are a lot easier to get rid of than others, due to their greater mass. However, collecting the power pills you come across will provide the extra energy you need.
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