Space invaders like clone. I like it but could do with a little variation. Perhaps different types of asteroids and may be power ups to give different weapons! Graphics are old school and nice but perhaps could do with some flare...such as a glow around the planet or particle explosions on the objects as they are destroyed. Good effort though and see potential! Not quite sure of the link to the theme as such though....
I'd really appreciate it if you would take a look at my entry and rate it too :)