We just finished implementing a neat little feature.
Whenever you discover a new main ending or get to a certain branch of the storyline, a new decoration appears in the main menu.
For example: if you manage to find the ending in which Cinders becomes the queen, her menu depiction starts wearing a tiara. It's an immediately visible reward, and it just feels good to spruce-up the main menu, as you go on discovering new ways to play Cinders.
Of course, we still have the usual gallery for watching all the discovered endings, but we thought this would make it more fun to collect them.