I'm playing right now with chrome and i used chrome for the whole development ... that's quite strange!
I see the page below, just click in the green highlighted area and then use the keyboard. Does that work?
I also modified the page background to dark gray, now you should see way better where "the game box is", click in it and the use the keyboard.
I tried to enable webgl as well by typing chrome://flags/ in the uri as suggested in google searches. I had some weird McAfee security plugin that I disabled as well... couldn't get it to work. No worries, I'll keep trying. It's probably just my browser. I see in comments someone got it working.... so it's something on my PC. I'm going to hit the sack now and get some sleep. Final push early tomorrow...
Hope you'll manage to get it to work. Keep me updated so i can fix any issue you find
