Hi guys, thanks for your answers!
Glee Rikud! the game in desktop devices work well, at least in firefox and google chrome. only in some mobile devices do not work correctamnte, for example in a Samsung galaxy S2 works perfect, but on a motorcycle G shows problems WebGL. then I have not solved the problem, I've noticed that if I apply as much value to the Opacity property, WebGL does not show the result I hope.
grigrizljac! I'll try adding sounds in that format (.m4a), what happens is that I tried to import them, but I make them .aac format automatically.
Thanks .. I will be more attentive to their recommendations. : D