Answer:
This only turns over once you have traveled very far. What is it?
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Forward Iām heavy, but backwards Iām not.
My love, when I gaze on thy beautiful face. Careering along, yet always in place, the thought has often come into my mind. If I ever shall see thy glorious behind.
I am so simple that I can only point. Yet I guide men all over the world.
Do what he says and you'll be fine, don't and you lose the game.