Boulders and Bombs

Publisher's blurb Your challenge is to tunnel to safety beneath the surface of an unknown planet as hostile, alien vultures seek to turn you into a buried fossil, entombed in an alien life form. While day turns to night above ground, you use your trusty roto-auger to claw a path to safety below ground - through tons of earth, boulders, and the ever-spreading green cave fungus. Fortunately, you can unearth time bombs along the way to blast away the hazards the vultures toss at you. But the crawling fungus spreads as time runs out.