To start, press space. After you have clicked your answer bubble, press the right arrow to continue. P. S. The quiz won't let you continue without an answer. Also, if you want to change your answer, just click the answer bubble you want to change it to.
My friend and I worked on this for her birthday party! We tried to make it as accurate as possible. Enjoy! P.S. I'm a Gryffindor :)