FYI none of the buttons seem to be working on the homepage in Firefox OS X. On Safari the formatting on the homepage is all off. Pretty cool nonetheless, I plan on trying this out more later today!
Sorry to hear that - we've done testing on Firefox/Safari and haven't gotten that, though definitely want to fix it up... Good luck getting into it later, and if you could help us debug just shoot me an email nathan@codewars.com. Thanks!