Stack the Countries

It would be very helpful if one could choose the continent for the questions. Im fairly educated & am interested in learning about countries but dealing with all continents is frustrating because
It is too much at one time. For example, I may want to start with North America & then perhaps move on to South America. When feel I know those continents fairly well, I may then choose to move on to Europe or Asia, etc.
I think this set-up would truly help one learn about the countries of the world in a easier format.

Mjwjq about Stack the Countries®