Any comment is potentially useful! And I like the motion as well, so there may be possibilities around time travel (or stopping time), ghostly things, a lifeless house (no one's visible in any of the windows) with life outside...

So far I've had one idea that I've sketched out into a sort of outline. It has potential but as so often happens, it could easily bloat beyond the 1K word limit. If that's a red pen Annie's holding in your usericon, I may have to ask to borrow it :-)