If you press escape to exit out of a level immediately after entering but before the icon appears the music for that level will begin playing on the menu screen alongside the normal menu music. This will continue until it either ends naturally or the player ends it by entering a level.
If you press escape to exit out of a level immediately after entering but before the icon appears the music for that level will begin playing on the menu screen alongside the normal menu music. This will continue until it either ends naturally or the player ends it by entering a level.