I've been working on a new game so sorry for the late updates. Here is a few changes i made to the game and a fix to the hidden room door being unoppenable.

Changelog:

• Removed gas mask & toxin effect when not wearing gas mask.
• Added a new fish eyed effect to the player.  With less intensity
• Fixed the hidden room door not being able to unlock.

Still wondering whether the having the fog makes it more spooky and atmospheric to the player than not having it.