WOW! Seems very cool!
So my hint about framing scene could be nice, but not very necessary. :) i definitely need to play skeletons and your game and see how the experience feels! :D
It's a very free-form game, lots is left to the players' devices, but it's good! One thing I recommend is that one of the players controls/decides for the intruders, instead of doing it collaboratively. It flows a lot better and has resulted in much, much better games.
I'll add some notes in Unexplored about the scenes. Maybe nothing too formal, but a reminder of the things that the players can work with. Thanks!