An entity representing the game world. It is used to store level settings.
A message to display upon entering the level.
A path to a wad file containing textures for the level. This property can exist multiple times.
The name which will be shown in stats and at the end of the level. If this property is not present,
message is used.
A par time in the format hh.mm.ss
A path to an audio file which will be looped for the duration of the level.