I like this story cause I had this idea too. A game I played with my kids on the tube. Or imagined I would have if they’d been there with me.
But I’m certain I wouldn’t have done it this well. I like to think it was a shared secret that only authors could see. And someone else ran with it. Well done. Ran further ran faster.
I didn’t care for the BBC adaptation, the characters were too…normal. But now I can’t remember what they looked like in my imagination, my version. I suppose that’s the difference between the vision and the reality of our world.