Works great on my Android phone in Chrome. Oddly there's a message on startup saying WebGL won't work on mobile.

EDIT ah, it's unity's fault apparently. According to caniuse WebGL is golden for all mobile browsers. They should get with the times ;)

One thing that the demo could improve on in the mobile department is that scrolling is too sensitive. Most attempts at tapping to modify the structure result in a totally random change of the camera.