Speed Plumber

STORY: You are a plumber tossed by your boss down into a newly constructed sewer that was put into service too soon. If you don't reach the valve at the far end quickly, the city above will overflow with sewage and you'll be fired! ...and probably drown in sewage, that's bad too. Turn the many valves on the way to the final one to ease the pressure and prevent an overflow, but it's not over until …