This is greatly enjoyable. It reminds me of Hans Rosling's little quizzes which he claims show that chimpanzees (random pickers) are smarter than professors on his hand-picked questions. It would be cool if it had an adaptive difficulty based on how good you are getting, giving you questions that are closer and closer in value.

Thank you for playing, I'll check out Hans Roslings' quizzes and add an adaptive difficulty feature for future development. I currently have a minimum difference of like 20% to make the game reasonable.