The story seems really weird and illogical.
<SPOILER>
Our character for some reason happens to be in this place without any memory of getting here, then we encounter a dead body to which our character responds "Another one"... How does he know that's another one? And what's with the "I wonder who the murderer is?" at the very end? <END OD SPOILER>
There was no need for these few lines our character have said... they just seemed like childish writing without barely any reason. But if you want to go this way and add the story- try improving your writing.
Also... the gems... I can't say if this was really dumb idea or actually a pretty good one so I'll explain both sides.
1. Bad: Including collecting little gems that look out of place and give you a happy sound when you collect them seems like it doesn't belong in the game that supposed to give you chills.(because I guess that was it's purpose)
2. Good: It was actually my favourite part of this game.