Comment by viddi

Flash games and animations often had a lot of static assets, like sound, bitmap images, or fonts. You could data-uri all that in your html file, too, but with all the base64 overhead it might be a good idea to compress everything afterwards (e.g. SingleFileZ, see my other comment). Of course only if file shipment is an issue for you, otherwise relying on your server's gzip compression might be enough.