eh, i'm not sure what details you want but the way i'm hoping this will work is that i'll give entrants story bits and they make a game with what i give them?
examples
1) The theme of this story: dark adventure. The main character: stupid alien. The major event of the story: journey.
2) The theme of this story: epic caper. The main character: laid-back assisant. The major event of the story: violence.
3) The theme of this story: humorous slice-of-life. The main characters: detached healer and burnt-out rogue. The start of the story: critical injury. The end of the story: misunderstanding.
4) The theme of this story: humorous transformation. The main character: philosophical biologist. The major event of the story: natural disaster.
5) The theme of this story: light-hearted quest. The main character: narrow-minded psychiatrist. The start of the story: reconciliation. The end of the story: sport.