They're twelve eggs with a difference -- when you click the mouse, they can hop up. And up, up, up the tree to the top is where they're headed, helped by the player's careful sense of timing. The ascent is punctuated by a series of little egg-baskets, some moving, some static. The player has 12 tries to get the eggs as high up the tree as possible -- when one goes Humpty Dumpty down below, the next starts from the highest point reached. But beware -- once an egg hops out of a basket, it needs to land the next step up, since it can't fall back in there again.