In this physics' simulation - the solar system is is throwing asteroids towards the earth. Some big, some small, some that are loaded with explosive material! You have the power of your god-like finger to easily block, shield, toss and maneuver asteroids away from the earth before they hit. You also have a variety of defense mechanisms, included rockets, nuclear missiles, defense fighter ships and shields!
How many waves can you survive? In this increasingly difficult challenge to protect the earth from sure annihilation!