I've seen a few games like this before, but none of them were very well made so I threw a quick version together (and I even had some fun improving my geography skills!).
I decided to use the game for a website I had been building - a free site for people to learn and practise English (EnglishDessert.com). It was good to add some content to the site and help people to learn the English names of world cities.
So I hope you have fun playing and learn a bit of world geography like I did !