I'm surprisingly bad at the first 5 countries suggested but I managed to guess the general region well enough to hit it correctly on the global map.
At the same time, I feel like a lot more people know where Australia is compared to (say) Laos.
I love the zooming in; Did I just know that country was in Europe or did I really know which map-feature was the country?
that's really the core struggle with learning games: not being too boring, not being too repetitive, not introducing stuff too fast, enabling user choice but also making sure learning is achieved...
will take both your point and parent poster's point into account :)
Also: After you guess one, a button to jump to Wikipedia to learn more.
Today I learned Lesotho is the largest sovereign enclave; there are two smaller on the Italian peninsula.