Could be anything. Be it some simple menu option or the way the story is conducted! Have any fresh ideas?
I once thought of this cool game that advances in gameplay and graphics as you get further into the adventure. It starts out as a very basic ancient PC-type game, but by the end it looks and feels just as good as a modern day game.
Story wise, the only real way to pull it off would be to have a self aware sort of deal with a comedic edge.
What are your ideas?