Oooh, does that color scheme present problems with colorblind players (those hard to please Protanopians)?
I can't answer that, as I'm not colorblind, but you know that is a consideration. Why not make things as accessible as possible if you are building new? I was going to say that I preferred the colorscheme of the current Quiz Game mode over this new scheme, but I didn't want to distract from other issues before.
Actually, to tell the truth, I prefer the colorscheme of the current untimed Flash mode best of all because it is higher in contrast, and for my eyes, that's much, much better. I don't suppose it would be possible to produce something with higher contrast for the new HTML5 modes?