The music is very nice, but a mute icon may be helpful so that players know to turn their sound on. Or have the ability to turn it off if needed.
The narrator's internal monologue sometimes over-explains what the player can infer. There's opportunity to trim it down.
I also would be interested to see the large chunks broken up with choices, even if those choices are benign and just serve as the narrator's internal monologue at the moment.
All in all I enjoyed the demo and I look forward to the full version.