It worked on my Android device when I rotated the screen to landscape mode, though not with optimal UI anymore. The bottom character row is invisible in portrait mode on my device. Great fun though!
Thanks - I did struggle with getting the game to size properly under different conditions. I sorely lack deep knowledge of the matrix of Android browsers/OS version quirks.
On Chrome on Android (whatever is latest on the Play store) in portrait mode, the bottom letters are off the bottom of the screen. If I rotate everything is small but I can see it.