There could have been so many more topics addressed other than this ones. I find it somewhat unsatisfying to try my knowledge of Minecraft in a quiz that asks me nothing about redstone, decoration (including paintings), mining, the Nether, renewability of resources, villages and other rendered buildings, enchanting and so much more. I wish there was a wider variety of questions your quiz would pick from. Besides that, I also disliked how fast you have to answer some of these questions, the time to browse through the answers consumes points by itself, making it a better scoring strategy just to memorize the answers instead of actually thinking about the questions.
That said, I really liked how some answers change as one tries the quiz again.
Summing up: it's not a bad quiz idea, but if you want to develop it a little bit further, I'd suggest adding MANY more questions to the database and making the timer not relevant to how one punctuates each question.