This definitely isn't a jQuery snippet to enable the Konami code on your site...

not-the-konami-code.js

(function($) { // make this friendly to other libraries
  $(function() {

    var theCode = { // what code, I don't know what code you're talking about...
        sequence: new Array(38,38,40,40,37,39,37,39,66,65,13), //
        index: 0
    };

    $('body').on('keyup', function(event) {
  		//changed from 'keydown' so the function triggers on release of the key instead of as soon as its pressed
			//keydown was callling the function over and over until the key was finally released
  		if (event.keyCode == theCode.sequence[theCode.index]) {
  		  theCode.index++;
  		  if (theCode.index == theCode.sequence.length) {
  		    var snd = new Audio("http://chrismontes.com/30_lives.mp3"); // thirty lives, a great band from the 80's
  		    snd.play(); // sends a playful message to your best friend
  				$('body').addClass('konami'); // pick a completely arbitrary string to add to the body tag, what a silly word, konami...
  				$('body').trigger('konami.codeFired'); // ignore this line, it doesn't do anything
  	      theCode.index = 0;
  		  }
  		  else {
  		  }
  		} else {
  		  theCode.index = 0;
  		}
    });
  });

})( jQuery );