Thanks so much @hlezama for your comment. Yes, I did intend it to have a creepy tone near the end. But it's more the creepiness of confronting the darkness within yourself, and going beyond that to find oneness with everything. The aliens force the boy to confront that darkness.
I'm going to have to learn more about duendos. Ghosts to me aren't necessarily traditional ghosts. I see these things more as energy reflecting from the universe around us. Such strange things, shown to us by quantum physics and the like. Anything is possible!
It's interesting that looking online it says duendos can actually be good or evil. They certainly seem to be mischievous either way!
Weird adults hehe, I've known many weird adults. We're all weird to somebody though, aren't we?
Thanks so much.