If I am posting this in the wrong place let me know and I'll move it.
I am having an issue where audio is not playing in Safari 7.1 (OSX Mavericks). Audio plays fine on Chrome and Firefox, and on IE when on Windows.
Develop games in your browser. Powerful, performant & highly capable.
This has already been reported numerous times. I think this post from Ashley answers it:
Solved the problem, thanks! Thankfully I don't need offline support lol
Delete offline.appcache and remove 'manifest="offline.appcache"' from the game's index.html