You are the maintenance man just arrived from Earth. Your task is to repaire the leaking air pipes in caverns under the Moon's surface, which supply the scientists of COLONY 11, a research station. There are inhabitants of the underground caverns which are indestructable, so must be avoided. To help you avoid them you are wearing a jet-pack, enabling you to fly over them, but watch your fuel supply. Press the RETURN key to take off and again to land. You can't use the jet-pack on the surface. To repair the pipes, you are carrying a plasma laser which when fired underneath the pipe engulfs the leak and seals it. This also drains your fuel supply so use with care. If you leave a screen without repairing all the leaks, on returning to that screen all the leaks will appear again. The air tanks on the Moon's surface can be used to replenish your air supply, by plugging in to them. Your air indicator will show how much air you have. CAUTION - DO NOT OVERFILL!

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