Game doesn`t work in Internet Explorer 9 and below

[teffy]

I think it happens because of missing HTML5/CSS3 Features, which can probably be added with the Modernizr/Selectivizr JS-Scripts.

My employer develops websites down to IE8 (limited support) - some operating systems have it as the preinstalled browser.

[serprex]

"some operating systems"

This is generally a WONTFIX. We test with Firefox & Chrome, & put a bit of effort into making mobile work somehow

http://caniuse.com/#feat=websockets
edit Also we use uglify's --screw-ie8