If you think it's not fair for the 1st, what about the last one who get to use mine as model (^^ my game is unplayable)What about a game jam where your theme is "the game ranked above you in your last game jam"?
For instance; I placed 35th in the GMC jam #2. This would mean that the theme of my game will be similar to the 34th placing game in the GMC jam #2.
It depends what you mean by "similar".
- recreate the perfect clone.
- or inspire a remake using the general idea and graphic style
- or kinda make a sequel