I see you took elements from Speedball 2100 for Playstation 1, which had a lot of wasted potential. You brought the potential that game could've had and kicked up a notch in flash!
A simple game with a good concept. I think you really got something here, work on maybe upgrades, powerups, more enemies, and stuff and you got a great game. I love the lighting effects,
 "Crunchball 3000"){kind=icon}
 "Zero Tolerance"){kind=icon}
 "One tough Pixel"){kind=icon}
 "Desktop Tower Defense 1.5"){kind=icon}
 "Perfect Balance"){kind=icon}
 "Hero's Arms"){kind=icon}