Great idea!

Problem of display at the beginning, but in fullscreen, no problem at all!

I wonder if it would be nice to press space to select an answer, because sometimes, I go down, and didn't stop directely when I saw an answer, so it is the one I 'accidently' selected. If I had to press space, I could that way go "inside" answers whitout select it, but it's perhaps not what you wish (because it would be easier)!