A nice prototype of the hotel project could be as simple as making a webpage. It would simulate some of the visual things we'd do, just to uncover visual problems.

I could see a single chair in a room. A user could click on it and it would be replaced by a slightly more tattered chair. The last image would be a broken, collapsed chair.

We could do the same sort of thing with a click and drag, to simulate finger drag.

Some things we might want to look into are animated aspects of this... it would be quite satisfying to have something explode...