Sorry, that's all I can say because, frankly, you did put in effort, but the flash is not that good. I know that goal of it is to be grotesque. You did a DAMN good job in making the repulsive characters look extremely morbid. However, I do not agree that flash is very funny (if its point was the joke, you could easily had it put in a 5 SECOND flash). If I ponder on the different details maybe I would reach to some conclusions about the meaning of the flash that are deeper than the most obvious ones.
I, however, find your movie pretentious.