This was the first Flash game I had the nerve to show somebody. CMG bought it off me for a nominal fee. I didn't dare release it on NG back then because I felt like it wasn't good enough. Ironically, most of the stuff I've released since then has been much worse, so when I found the old swf tonight, I decided to just submit it. I figure it's probably worth at least a green score.
As the title suggests, gameplay is extremely linear. You'll pretty much fight the same squadrons of ships on ten different planets. Your ship has a standard pea-shooter weapon, a life bar, and some extra lives. Each planet has a boss which I think is the best part of the game. The game's content is generated procedurally, and the game loops forever with some slight increases in enemy firepower.
Unfortunately, there are no powerups, no plot, no story, no ending, and very minimal music. Hopefully you'll have a little fun with it anyway. I think for such a linear game, it's as polished as I could make it.