It seems it is just a mid game at the begginning, then somehting happens and you understand. You realize you're playing on of the game that if was popular enough could've made the history of the media. Then if you are not satisfied with the main game you can try to open that door. If you menage to do that you become a png of a guy made of galaxies that trascend into the universe with nebula eyes in background and achieve inner peace.