5 stars: Very challenging! I find the country outlines especially difficult but I am starting to get them regularly. I have learnt a lot of World geography and that really helps me when watching the news. I find the ads unobtrusive. As.well, it's a hard game! I've been playing about 4 years and I'm still learning. Thanks for a excellent game that is teaching me about how humans are distributed on our planet.
5 stars: I have learned so much in a short time and had fun doing it! If you find yourself opening new options that seem overwhelming, it is simple to go into options and adjust it to what you feel comfortable with. For the first time in my life I feel knowledgable about the countries, continents and islands of this planet and where they are located. Excellent app!
4 stars: Excellent for learning a bunch of geography basics and advanced topics. The only drawback is that the order of what you unlock is not up to the users preference, but I guess that's how they get to make more money of of you. I managed to learn all my countries, their flags, where they are located in the world quickly (2 mths) but even if I'm not interested in the country leaders, your forced to go thru the
4 stars: Much more in depth than I expected. I must admit the graphics aren't great but the game is well done and the amount of different categories of questions to unlock is huge. Just wish it was easier to unlock new options, as it takes quite a while to level up after around 10~ level ...