I am sorry, but I did not like this game. Hey, another reference to September 11th! Anyway, I could not get into it, because it was too difficult. It annoyed me how you were killed by the enemy falling towards you. It didn't make any sense. Birds wouldn't explode anyway.
I don't think the graphics were all that great either. The sounds were a tad annoying. You do get some points for creativity. It was unique, but not enjoyable. I do like "Space Invaders".