This seems to be the highest rated Halloween flash I've seen this year! I think this will probably win any award you ask for. As for there was no dialogue, you told the story by having all that fantastic music being played. I was kind of expecting more of a climax, but it's definitley worth checking out. The best thing is probably how awesome the animation is. It's also great to see the kids dressed up as stuff popular on this website.
I just celebrated Halloween and I don't think I saw any costumes like that. Of course, I didn't give most of the candy out. I also like how you show the magician Madness flash in the credits. There just seems to be a lot of flashy stuff going on in this. It's cool that you made it like the Grim Reaper (or whoever it was) sympathetic.