Funny, a lorra lorra potential here (humourwise)
Pretty solid graphics. Liked the sounds. That poor old city being raped by UFOs and bombed every day. LOL there were cows in the city. And the ship running over the fun fair.
If you build on this thing, add some witty events, improve on the graphics a little, it could go far, you could go far on NG. Maybe add a story also, but don't make it serious in any way, or it will be crap.
And to those people who still heard the flash after they closed it - maybe it was so mezmerising that it just carried on sounding in your head, I mean come on, it is fairly good.