I built Geonary.net - an interactive world atlas with geography quizzes

I'm a geography and data geek, and I built Geonary.net a website that combines an interactive world atlas with geography quizzes. You can explore country data on population, the economy, health, and the environment, or test yourself on flags and country outlines. The atlas is open to browse. Flags and Silhouettes on Easy work without an account; a free account unlocks more challenges and saves your progress. Atlas: geonary.net Quizzes: geonary.net/quiz I'm the creator, and I'm still trying to understand what people find most useful. If you try it, which would bring you back: exploring the country data or playing the quizzes? And was anything confusing on your first visit?