Storytelling Carries the Day
I was initially going with a 6, but I opted for a 7 because it is obvious you put a lot of effort into this flash. Your ability to tell a story is what won me over. The story is somewhat predictable. As a fan of Sergio Leone westerns, I pretty much knew how this would end. There are a couple of holes in the plot as well. The glaring one is why the villains ran off after gunning down Todd, instead of either going into the crypt or waiting for Henry to come out.
The art is a bit above average, but progressing from earlier works. The sound editing was uneven at times, especially in music transitions. You should make sure to credit the sources of all the music you used, or find open source music you can use in future animations.
One thing that would really improve your storytelling is to work with subtle nuances in the characters. Emotion comes through several times, but not enough to really be effective. I would have gone higher if nothing else changed except for more expressive characters.
I would say this piece represents a coming together of your skills. Since the story in this flash is somewhat derivative, I'd suggest working hard to tell an original narrative. But give yourself a pat on the back. If even half the artists who submit to NG put the effort into their flash work as you do, it would be a really kick-ass place.