One thing I noticed about the ranking system is that the ranks are based on the ratio of how much enemies you killed to how long it takes you to complete a wave, rather than how difficult the wave was to how long it takes you to complete the wave. But then again, who cares?
Guys, please don't cheat. Games are for fun, not for cheating. And besides, you won't get that feeling of accomplishment if you cheat than if you actually EARN the hard and impossible badges. Besides, this game practically has the easiest impossible badge in Kongregate.
Hardest damn medium badge of the day. And what I'd like to know is: how the hell can the planes/UFO/military planes crash into goose, but not into each other?
"When I waved my hand at her, she didn't notice. When I gave her a color, she wasn't satisfied. When I gave her all the colors I can find, she never noticed me, yet, I slowly fade away for each color I give to her. Despite these facts, I would die for her, for she was everything to me."
Jlong, why not just make three difficulty settings: easy mode would have no time limit/a LOT more time, normal mode would have the time limit, and hard mode would have a lot less time. Either that or add more to the time limit. :p
 "Pirates Vs Ninjas"){kind=icon}
 "W-Zone"){kind=icon}
 "Streamline"){kind=icon}
 "Linx"){kind=icon}
 "Async Racing"){kind=icon}
 "Endless Migration"){kind=icon}
 "Grey"){kind=icon}
 "6 Differences"){kind=icon}
 "Doeo"){kind=icon}
 "Soul Tax"){kind=icon}
 "Dream World"){kind=icon}
 "Synapsis 2 : Walkthrough"){kind=icon}
 "Not To Scale"){kind=icon}
 "Pixel Legions"){kind=icon}
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That would be another option, yeah.