I've gotta admit, I was taking pretty off guard by that ending. It wasn't until I got to it that I was able to see how well you'd dropped in hints of the backstory bit by bit. You did a good job setting up the whole pendant thing. There were some minor spelling and grammar errors, and I was a bit confused about the dwarven lady, but other than that I found this to be an interesting story!
(By the way, did you use the Harlowe (default) story format for this game? If so, there is a way to add music, by using the Harlowe Audio Library: https://twinelab.net/harlowe-audio/#/ Hope it helps!)