Hidden within the files, you can find some unused content and earlier versions of some assets.
Animatronic Luigi good.png
GTCh3Act1_1b.png
Background locations from pausing the game, most likely placeholders as they refrence other RPG Maker Horror Games
"Out of Order" assets, probably would've been used for a part where you won't be able to pause
What it looks like all together (Thanks ice_anime67)
Early Version (left) and Final Version (right)
AoOni.png (from Ao Oni)
sachiko.png