Calling this a 'game' is perhaps going a little far. It's more of an interactive quiz.
It's fun if you can do it. Probably very annoying if you can't.
I'm delighted (and very smug) to say that I did incredibly well, only mixing up the four countries north of Afghanistan.
You know, if I start a country, I think it's going to be called Asdfghjistan. Or possibly 'The People's Republic of Asdfghjistan'. I'd like it to be somewhere in Kent. I would rule it as an occasionally benign tyrant until I got bored, then abolish tax for sushi chefs.