I liked it.
It was pretty damn good. Original, you even gave it a little story line for anyone (like myself) who feels those are important when playing short games.
I did get bored with it after the 2nd level. It was very repetative and i found it extremely challenging for my skills. A very simple concept yet i had trouble with it.
I think it you made an unlimited supply of weaker fireballs, like really weak, to the point of almost useless weak. But still doing damage weak. Then you have to make stronger and stronger ones. Because i was flying backkkkkkkk and forth and back and forth just tyring to make fireballs to keep the repair copters from bringing other factories back. It was madness! All in all you can go places with this game, atleast on newgrounds. Work on a sequel and take some of the sudgestions we give you and really think abou them.
Good work.