Super Mario in 14kB Javascript

Published on 2008-04-10 by John Collins.

Written as a proof of concept, here is a playable demo of a Super Mario game with sound which is written in 14kb of Javascript:

"Super Mario in 14kB Javascript" -

Very impressive!

Updated 2021 : note this post is from 2008 and is now out of date. The original link is now dead, so I have unlinked it.