Since another commentor mentioned it running fine on their mobile device, I decided to run it on my tablet which coincidentally also uses an Intel Atom cpu + gp

Since another commentor mentioned it running fine on their mobile device, I decided to run it on my tablet which coincidentally also uses an Intel Atom cpu + gpu. It chugged along at about one frame every two seconds for about 10 seconds, before an app not responding dialog appears. I reported it, and the tab was restarted. On the restart I get a bottom of Chrome message "Rats! WebGL hit a snag". It has a helpfully (not) grayed out "Learn More", Reload or Ignore. No matter what I did I couldn't get it working again, with the browser showing "WebGL not supported". On my Nexus 5 it ran just fine - smoothly even although there is a lot of aliasing.