Repeats same countries – Maps of All Countries Geo-Quiz Review

I don't mind the frequent ads. What I do mind is getting all of the countries correct, but consistently presented with the same selection of <100 across all games. What the...?? Many countries in African, South American (continental and the islands), South Pacific, etc. especially are never presented in the quizzes. Many are only rarely presented. I do like how the developer has 2 types of games: fill in the blank or multiple choice.
Review by imho_tunes on Maps of All Countries Geo-Quiz.