Sloppy question writing
I like the concept, but some of the trivia questions are not correct. Urology is the study or urinary tracts. When I was asked what urology was, that wasn't even an option to pick. Also, when asked which body part Vincent Van Gogh cut off, I selected ear and was told that was the wrong answer. I chose Vegetable when asked what type of food okra is. A monkey was the first animal in space (on June 11, 1948, dogs came later in the 1950s). And I was selecting answers in the same manner I had selected answers other times when I had been given a correct answer. Either the question has the wrong answer in the game, or the mechanism is too sensitive. Even in your sample question: Washington, DC is the capital of the U.S., not Washington-especially if you're going to contrast it to another state like California. If you're making a trivia game, the burden is on you to get the questions and answers right. Otherwise, why would we go through the challenge of trying to play it?