There are many classic games on Nintendo NES, sometimes they can arouse our memories about the years in 1980s.
Now, seldom people play NES, but they can play these classic games with an emulator on PC. With the development of the internet so that these games are ported to the browser.
The famous example is Super Mario:
The total js files' size is up to 320k, the browser can play the game smoothly.
The 
Spacius:
http://scriptnode.com/lab/spacius/
The Spacesick:
http://spacesick.blogspot.com/2009/04/spacesick-nintendo-game-new-update.html
