Thank you so much! I actually did skim through the guide before, but upon reading through it this time, I realised that I should have read through it more thoroughly than I did. I'm going back to get the last ending now.
I really did like the game's soundtrack. It perfectly conveyed the intended atmospheres of the different moments in the game, especially when things were meant to be tense and creepy. The third and fourth floors were especially terrifying to get through for me. The soundtrack is one of the most important parts of any game, especially horror games, and I can say, without a doubt, that the soundtrack was one of the best parts of this game.