Submerged Superstructure and bitter aerie now have threat themes!

Fixed an issue with the underhang threat theme not playing in a couple of the rivulet specific underhang rooms.

Drainage System's threat theme no longer has issues looping!

Attempted to remedy a small issue with the drainage loop, its not perfect but it'll do for now.

Fixed an issue where the modify files were incorrectly set, thus causing certain rooms to crash the game.

Added a threat theme for Subterranean, features alternate instruments for Filtration System

Addressed a bug with the shaded theme that stopped it functioning. Should be fixed!

Updated Workshop art