Move the Earth around with the power of your mouse to dodge the waves of asteroids attracted to you by gravity. Get them in a close orbit to destroy them or pick up a Gravity Blast and shoot them out to space. The Earth will explode after 3 hits from anything so watch out!
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For those having trouble figuring out how to get asteroids to orbit you, check out the video url below...
http://www.youtube.com/watch?v=ioaXPnPDObgUse the mouse to move the earth around. Get asteroids to orbit you in order to lock on and destroy them. You must pick up items in a similar fasion (lock on and capture them not run into them!). For detailed instructions it is recommended that you view the in-game directions.