Ryuta, the contributor, has included all of the css, characters, controllers, js files, and even the cheat codes that worked in the original game. All this is a wonder of the web and that of HTML5 and how far it has come. With such high end game, and to work independent of the hardware platform that its running on is indeed quite an amazing thing. We should note that we didn’t see any indication that this is sponsored by Blizzard.