hum..
I think you got a nice peace of game here, nevertheless it wasn't entertaining as much as the other "good" (i mean the one that is worth) space shooter i've played. Maybe because the ennemie's formation hasn't been set up "properly", if you look to most of space shooter(not on ng uh? ;) ) at no moment you should be relaxing, always something to kill...and the upgrade shop system kills a bit the game, i mean it's harder to try to get a "flying" item while playing than buying it from the shop (well you could do half and half).
Playing in the space is like driving by night on a straight road, if there is nothing happening it goes boring.
So yes good game but i won't spend an hour on it really. ++