Menu stages

In the current menu system, there is a dirt background. Wouldn't it be nice to change the kind of background, the deeper you go into the settings?

Eg:

- Main menu (with SP, MP, Options..., etc.): overworld

- Options menu: Dirt background with bits of stone on the bottom

- Video Settings: Stone background with bits of common ores, maybe part of a mineshaft

For further setting menus you go even 'deeper into the ground'.

Maybe add some transitions in between these menus