Nice game. There's a mistake in the last column - one answer is "UK France" at the moment - needs to be one or the other (or, in fact, both, but not in the same box :) )
Agreed, this was fun and interesting. I saw in another quiz, as well as yours, calling Monaco a country in the Alps - to be honest, I find that idea ridiculous! It is wholly within one kilometre of the sea, and has one of the lowest high points of any country at only 161 metres.