How about creating a map of capitals, not countries? If you did a map showing no borders at all, but it just lit up a dot for each capital's location when you enter that capital's name, that could make for some interesting quizzes! Maybe do the same thing for large cities, eg 5 million+
What's up with the strict spelling on Ulaanbaatar? Every other quiz accepts close approximations like "Ulanbatar". Also, you give Sri Jayawardenepura Kotte with "Sri" -- where the World Capitals Quiz won't give you "Sri" unless you add "Kotte" to it -- but you have to type all of Bandar Seri Begawan, while the World Capitals Quiz accepts "Bandar Seri".
I don't know how many times i've tried it but i still can't get it