Okay so far but I have some ideas
Well I don't know if the' flash' issue is such a big deal. It might make life easier for you if you wanted to use drawings and panning cameras instead of doing the whole SIM thing. I have no idea what the rules are on NG for this. BUT that aside, I think that the following would help:
1. The 'Timberline Lodge' used in Kubricks 'Shining' is a lot scarier looking than your hotel thus far. I don't know if that's available in the SIM mode.
2. If you're going to go all the way with this (which I think could be neat.) I would recommend using the actual soundtrack composed by Wendy Carlos.
3. If you're gonna do SIM all the way I would recommend getting some friends to do voice acting (that's always fun).
4. Personal Request: Kubrick never filmed the scene where the garden maze animals come to life. I'd love to see that.
If you need help locating the soundtrack feel free to PM me and I'll help in any way I can :)
In the meantime 9/10; 5/5 - DJ Bone