There was a Yeti thing, too - it was all in the Penguin Mafia story. See, the hippies started everything by campaigning against people going up to where the Yetis live, so the Yetis lost their primary food supply (unwary Adventurers) and became Emaciated Knot Yetis. Then the Penguins moved in to scout out the area, and that was the start of their rise to power in the Kingdom.
I would try not to build worlds in one-shots, but... I always build worlds. Every single time. I'm never content with the real world, or the Pokémon world, or whatever established world I'm supposed to be writing in. Things creep in. One of my novels was meant to be set entirely in the world as we know it, but changes to history ended up creeping in so that World War One didn't happen, the Falklands War was a lot bigger and bloodier, and there were huge wild dogs roaming the British countryside. Plus I set part of it in the afterlife, or at least the world that administers the transition from this life to the next. I'm cursed with an eternal 'what if...?' that leaves its mark on every story I write: what if the characters in stories were actors? What if the Grim Reaper were real, and he refused to kill someone? What if the Pokémon world were biopunk? What if people worshipped cheese?
To get back to the point, I agree about the 500-word one-shot contest: we should totally have one of them. One of my favourite stories is only 100 words long, for instance, and I'd love to try my hand at really short fiction, forcing myself not to expand. A contest would be the perfect way to do it, since otherwise my willpower would definitely break and I wouldn't be able to stop myself going overboard.
I know what you mean about Some Stars. There's been times when I've felt the same way about things I've written, but I'd rather consign them to the ash-can of history than actually rewrite them. Such is the lot of the author, I suppose.
You can see exactly how successful my reviewing drive has been by the number of reviews I've currently done: one, for Some Stars. It's hard to bring myself to review the ones that don't capture my interest with the depth and quality of their ideas and writing, even though those ones need help to actually get to that level, especially when a decent review takes so long to write.
Ah, well. I'd better go and redeem myself now by reviewing something. I will do it this time, and not get distracted by video games, books or my own stories.
F.A.B.