Amazing Idea. Great Gameplay.
Graphics:
Although they aren't anything AMAZING, they have a good feel to them and they really work well for what they're used for. Nice. (8)
Style:
Incredibly unique and clever twist to the traditional "protect the city" space invaders style game. Really caught my attention and kept me playing. My only complaint is the game was really too easy to beat. Might I suggest a difficulty modifier? Or maybe make the air run out a bit quicker. I never ran out. I don't even think I was ever halfway. Never-the-less, excellent. (10)
Sound:
Nothing special. Works for what you've got. I like the metal bubble sound. (6)
Violence:
Not really violent. Although it doesn't need to be.
Interactivity: It's a game. (10)
Humor: Not really applicable. (3)
Overall: Great game, decent graphics, excellent idea. I look forward to updates or more great games. (9)