They've travelled millions of miles, across the galaxies, their mission was simple, "Pose as stupid creatures and study the habitat". The sheep soon forgot their mission and preferred instead to enjoy the sunshine and wallow in the lush green pastures. Now it's time for them to return home. Your task is to guide the Sheep back to their celestial ancestors, saving them from the perils of electric fences, shark-infested ice cream and combine harvesters. It's not as easy as it sounds, especially when your sheep flock off in the other direction!