A very basic but fun game. 

I'd suggest changing the asteroids though to make them stand out a bit more. (maybe a different color or some sort of effect like a red trail could work)

Great game!

Good idea for a gameplay! I played several tries and I had fun! Nice intro tho!

Cool Game and nice Idea, very tough.

Really cool game. The intro look pretty, defending the earth with the cloud shield has good visuals and the game is really hard (which for me atleast is good thing).