I played through it all last night. The only issue I ran into was the music not playing after loading a savegame on one occasion. I have no idea how reproducible this is but I was in the room with the scholar with music playing. I saved my game then took the pills to get the secret ending. The same music kept on playing at this point which may or may not be right. I reloaded my save and there was no sound at all. I walked outside, still wasn't hearing anything and decided to reload again at which point the music was playing again.