[fatjonny]

It is not IE only. CreateJS works well in the major browsers. The games work in new versions of all browsers. The games are only ad-free in IE and should work well especially in IE 10 as this looks to be partially sponsored by Microsoft.

Some of the links at the end also pertain specifically to IE.

[TazeTSchnitzel]

Microsoft also got Cut the Rope ported to HTML5 for IE9: http://cuttherope.ie/ (yes, they used Ireland's TLD since it's IE...)