I took the time to max out my characters and max out my runes to take on the final boss. Then he just randomly died after a couple rounds of hits with about 95% life, awarding me the hard badge. I suddenly feel so dirty.
Now for a rating: This game is damn fun once you get the hang of it. Predicting the enemies' movements can be difficult, but therein lies much of the challenge. I enjoyed the originality of the game, and it ran smoothly on my old ass computer. I have no reason to NOT give this game a 5/5.
Strategy that got me this badge of the day: Get chased while dropping gas from the plane that can. Two of the ships decided to be an hero and plow through the gas. Then I just looped back for the last straggler, then it was just a matter of distracting the bomber with one ship while the other ship flew behind and finished it off.
That's another 1 for the USA... thanks a lot jcrboy! :D