Oh No, Asteroids!

It's almost 2012, with World Destruction right around the corner, what else can we do but make games about it?You are tasked with defending the Earth, in all it's spinning glory, from the might of giant flying asteroids that are being drawn directly at it!Build platforms and then pick and build turrets on top of them - destroy them with gun turrets, pull them away with tractor beams, and place min…