JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.aspnetcdn.com/ajax/bootstrap/2.3.1/css/bootstrap.min.css">
<link rel="stylesheet" href="http://ajax.aspnetcdn.com/ajax/bootstrap/2.3.1/css/bootstrap-responsive.min.css">
<div class="container">
    <div class="page-header">
         <h1>RxJS Konami Code example</h1>

        <p class="lead">Example to show the Konami Code in action!</p>
    </div>
    <div class="row-fluid">
         <h3>Enter the Konami Code</h3>

        <p><kbd class="keyboard-key nowrap" style="border: 1px solid #aaa; -moz-border-radius: 2px; -webkit-border-radius: 2px; border-radius: 2px; -moz-box-shadow: 1px 2px 2px #ddd; -webkit-box-shadow: 1px 2px 2px #ddd; box-shadow: 1px 2px 2px #ddd; background-color: #f9f9f9; background-image: -moz-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -ms-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -o-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -webkit-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: linear-gradient(top, #eee, #f9f9f9, #eee); padding: 1px 3px; font-family: inherit; font-size: 0.85em;">↑</kbd><kbd class="keyboard-key nowrap" style="border: 1px solid #aaa; -moz-border-radius: 2px; -webkit-border-radius: 2px; border-radius: 2px; -moz-box-shadow: 1px 2px 2px #ddd; -webkit-box-shadow: 1px 2px 2px #ddd; box-shadow: 1px 2px 2px #ddd; background-color: #f9f9f9; background-image: -moz-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -ms-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -o-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -webkit-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: linear-gradient(top, #eee, #f9f9f9, #eee); padding: 1px 3px; font-family: inherit; font-size: 0.85em;">↑</kbd><kbd class="keyboard-key nowrap" style="border: 1px solid #aaa; -moz-border-radius: 2px; -webkit-border-radius: 2px; border-radius: 2px; -moz-box-shadow: 1px 2px 2px #ddd; -webkit-box-shadow: 1px 2px 2px...

JavaScript

var codes = [
    38];/*, // up
    38, // up
    40, // down
    40, // down
    37, // left
    39, // right
    37, // left
    39, // right
    66, // b
    65 // a
    ];*/
var konami = Rx.Observable.fromArray(codes);
var result = $('#result');

$(document).keyupAsObservable()
        .map(function (e) {
        return e.keyCode;
    }) // get the key code
    .windowWithCount(10, 10) // get the last 10 keys
    .selectMany(function (x) { // compare to known konmai code sequence
        return x.sequenceEqual(konami);
    })
    .filter(function (equal) {
        return equal;
    }) // where we match
    .subscribe(function () {
        result.html('KONAMI!').fadeOut(2000); // print the result
    });