wow I got 16 and not displeased with that haha. Many familiar names there, though not that I knew they were used for moons. (like fenrir, cerberus and styx, Ill never forget that they are moons aswell now)
Great quiz idea. Some typos, and to be honest my spelling was off by a letter on a few and most quizzes would have accepted it, based on phonetics (such as Calisto not being accepted when Callisto was the proper answer).