Your excavator is a powerful minigun — but it is fragile and explosive when it collides with the walls or the floor of your mine. Left and right thrusters help you dodge the walls, but there is no vertical thruster. To keep from smashing into the bottom, you must use the gun's own recoil: each downward shot forces the minigun upward, buying those precious moments of freefall needed to expand your mine. Great riches await the skilled Minigun Miner.