The challenge was left open-ended, with just a faint suggestion of a prompt, so we got quite a variety. I don't know if that's good or bad; I found it a little hard to get started because it felt so open-ended, but in the end I decided to go with that thematic hint even though nobody else did, and that allowed me to write something. So I'd suggest, from my own experience and because it seemed to work ok in the chat challenges, to have some sort of prompt. It should be something that lends itself to a variety of approaches -- a short phrase or a theme has seemed to work well in the past.