Asteroid Annihilator

This is a game made for the Ludum Dare 50 game jam. Planet Earth has found itself on the brink of annihilation. Use the state of the art laser defense system to destroy as many asteroids as possible. When asteroids collide with earth they do damage to your health meter. The bigger the asteroid the more damage done. Destroy UFO's to gain power ups and delay the inevitable destruction of earth! The more asteroids you destroy the higher your score.  Post your High Scores!!!