Also.
Game was made with some version of RPGMaker--RGSS file is just an executable with the media (character icons, sprites, etc) in it, the game would work without it if you already had the program installed, but since you don't, you need the file in the OP.
I found some Let's Plays of it on YT, but they're a much different version than the one you linked us to, Taboo. Events were much smoother too, is this an older version? (For example, right off the bat, the plate shards are two different events, but in the video, it's one)
Edit: In the video the guy uses the bedroom key on a bedroom that's in the same hallway as the attic. There is no bedroom.. I think you downloaded an older version of the game that wasn't finished, Taboo.
