Hi Bren G. I would agree with TJ's comments. Also, a few other quick things:
I wasn't sold by the concept. It might seem silly to say an unusual concept in a SF&F story doesn't seem reasonable to me, but somehow this one just didn't convince (or perhaps ensnare) me. The idea just didn't work for me, though it certainly was unique in this Challenge.
I had an issue with the structure of the first sentence of your story, and I think this took me out of the flow right away, and might have contributed to my not enjoying the story more. I'm referencing the italicized bit below:
The man exited the 210 from Memphis, made his way to the Chinese theatre
and stared down at his star upon the sidewalk for the last time.
My first read through I seem to recall thinking this could mean two things - that he was looking at the star for the last time, but also that this was the last time that the star would be upon the sidewalk. Do you see what I mean? I figured out what you must mean, but this tiny moment of wondering about the ambiguity took me out of the story's flow. If you'd re-ordered the sentence like this...
The man exited the 210 from Memphis, made his way to the Chinese theatre and
for the last time stared down at his star upon the sidewalk.
...you eliminate the semblance of ambiguity, and I think have a much nicer, more literary sentence.
Yours was a good entry, but for me just wasn't striking enough to make my shortlist. But keep entering!! And the 300 worder is this month, too.