Questions of State is an entertaining way to learn more about the United States and Cascoly's unique system lets you decide how difficult to make the game, and the game remembers your responses. There are billions of possible questions, so it's unlikely you'll ever see 2 identical questions, no matter how long you play. In addition, the game watches your responses, and adjusts the questions to your skill levels, so the game becomes tougher the more you play. You can also select the particular countries to be included by changing the difficulty level. The game asks questions in 20 categories from among over 250 countries, including capitals, climate, natural resources and flags.