The Alien Attack

You control a soldier running through the corridors of an alien ship. Your main goal is to reach the end of each level, fighting off various gray aliens along the way. You jump across gaps, avoid environmental hazards, and shoot enemies with a simple blaster. The pacing is quick, and the difficulty comes from the number of enemies and the precision needed for some jumps. It feels like a brisk, uncomplicated run through a familiar sci-fi setting.