[mattmalin]

There's another lightweight version to do this here: https://github.com/mckamey/konami-js

This includes a minified version resulting in a <1 kb addition to code: https://github.com/FlorianBezagu/Konamiz/blob/master/konamiz...

Also worth considering is konami-js (https://github.com/snaptortoise/konami-js/blob/master/konami...), which treats cases different such as if running from iphone if not wishing to change to the standard code.