neat
Like you said, it was short and to the point. The art was good, the setting self-explanatory, and I liked the fade-in / fade-out graphics. I concur with a previous review, I would have liked the gun in the end to b/w...it was a little jarring to see a fountain fill in otherwise inkwork.
I suggest adding a few more sound effects for ambience (whistling wind for the tumbleweed, for example). And maybe a view of the clock, mounted on the front of the local hotel? Or wherever they tended to mount them, I'm not an expert on western set design, haha.
Anyway, neat Flash!