Plays the Space Age soundtrack (Vulcanus, Fulgora, Gleba, Aquilo and space platform music) in games where the Space Age mod is disabled. The music is not included: unzip the mod and copy it from your own Factorio installation (see the mod page). With Space Age enabled it leaves the music alone, and the music player still works.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.