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HTML 

              
                <div class="timer__container">
    <div id="timer" class="timer"></div>
</div>
<div class="scores__container wrap clearfix">
    <div class="score__container">
        <p>Score: <span id="score" class="score"></span></p>
    </div>
    <div id="pb-container" class="pb__container">
        <p>Personal best: <span id="pb" class="score"></span></p>
    </div>
</div>
<div class="wrap">
    <h1 class="title">Name that colour!</h1>
    <p class="subtitle">Click the colour, <em>not</em> the word. <a href="https://codepen.io/tanner_/full/e259f8d33a896f23a4003f66c48bd251/" target="_blank">Full screen view</a> works best.</p>
    <button class="start" id="start">Go!</button>
    <p class="word" id="word"></p>
    <ul id="options" class="options__container"></ul>
    <div id="gameover-container" class="modal__container">
        <div class="modal">
            <p>Game over!</p>
            <button id="restart">Have another go?</button>
        </div>
    </div>
</div>
!

CSS 

              
                @import "bourbon";

body {
    margin: 0;
}

// vars
$red: rgb(236, 111, 134);
$yellow: rgb(255, 221, 117);
$blue: rgb(69, 180, 231);
$green: rgb(178, 240, 104);
$pink: rgb(255, 192, 203);
$sm: 480px;
$md: 768px;
$lg: 1024px;
// mixins
@mixin bp($size) {
    @media screen and (min-width: $size) {
        @content;
    }
}


/* Generated by Font Squirrel (https://www.fontsquirrel.com) on May 15, 2016 */

@font-face {
    font-family: 'komika_axisregular';
    src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/212141/komikax_-webfont.woff2') format('woff2'), url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/212141/komikax_-webfont.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}

body {
    background-color: #F9F9F9;
    font-family: 'komika_axisregular', Arial, sans-serif;
}

button {
    font-family: 'komika_axisregular';
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

.wrap {
    margin: 0 auto;
    width: 90%;
    max-width: 1200px;
}

.timer__container {
    height: 5px;
    .timer {
        height: 100%;
        background-color: $red;
    }
}

.scores__container {
    margin-top: 1em;
    > * {
        display: inline-block;
    }
    .score__container {
        float: left;
    }
    .pb__container {
        display: none;
        float: right;
    }
    p {
        color: #8A8A8A;
    }
    .score {
        font-size: 1em;
        @include bp($md) {
            font-size: 2em;
        }
    }
}

.title {
    margin: .5em 0;
    text-align: center;
    font-size: 2em;
    color: #4A4A4A;
    @include bp($md) {
        margin: .25em 0;
        font-size: 3em;
    }
}

.subtitle {
    margin-bottom: 2em;
    text-align: center;
    color: #4A4A4A;
    font-size: .75em;
    @include bp($md) {
        font-size: 1em;
    }
    em {
        padding-bottom: 3px;
        display: inline-block;
        border-bottom: 2px solid #4A4A4A;
    }
    a {
        color: $blue;
        text-decoration: none;
        border-bottom: 2px solid $blue;
    }
}

.start {
    display: block;
    margin: 0 auto;
    padding-bottom: 10px;
    width: 150px;
    height: 150px;
    border-radius: 100%;
    background-color: #EC6F86;
    box-shadow: 0 0 5px 5px lighten(#EC6F86, 10%);
    font-size: 3em;
    color: #F9F9F9;
    border: 0;
    cursor: pointer;
    animation: glow 1s infinite;
}

.word {
    font-size: 4em;
    text-align: center;
    @include bp($sm) {
        display: inline-block;
        width: 50%;
    }
    @include bp($md) {
        display: block;
        width: auto;
    }
}

.options__container {
    margin: 3em 0;
    @include bp($sm) {
        display: inline-block;
        margin: 0;
        width: 50%;
        float: right;
    }
    @include bp($md) {
        display: block;
        margin: 3em 0;
        width: auto;
        float: none;
    }
    li {
        margin-bottom: .5em;
        text-align: center;
        @inluce bp($sm) {
            margin-bottom: 0;
        }
    }
    button {
        position: relative;
        background-color: transparent;
        border: 0;
        font-size: 1em;
        color: #8A8A8A;
        cursor: pointer;
        @include bp($md) {
            font-size: 2em;
            line-height: 1.25em;
        }
    }
}

.modal__container {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    background-color: rgba(0, 0, 0, .75);
    .modal {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 90%;
        padding: 25px 0;
        @include transform(translate(-50%, -50%));
        background-color: #fff;
        border-radius: 5px;
        @include bp($sm) {
            width: 450px;
        }
    }
    p {
        color: $red;
        font-size: 2em;
        text-align: center;
        @include bp($md) {
            font-size: 3em;
        }
    }
    button {
        margin: 50px auto 0;
        padding: 1em;
        border: 3px solid $blue;
        border-radius: 10px;
        background-color: #fff;
        color: $blue;
        line-height: 1;
        cursor: pointer;
        transition: all .25s;
        @include bp($md) {
            font-size: 1.25em;
        }
        &:hover {
            background-color: $blue;
            color: #ffffff;
        }
    }
}

#restart {
    display: none;
}

@keyframes glow {
    50% {
        box-shadow: 0 0 10px 10px lighten(#EC6F86, 10%);
    }
}
!

JS 

              
                "use strict";

var wg = function(difficulty) {
    var names = ['Red',
            'Yellow',
            'Blue',
            'Green',
            'Purple'
        ],

        colours = ['rgb(236, 111, 134)',
            'rgb(255, 221, 117)',
            'rgb(69, 180, 231)',
            'rgb(178, 240, 104)',
            'rgb(167, 111, 236)'
        ],

        timeout,
        timer;

    var domCache = {
        startGame: document.getElementById('start'),
        wordContainer: document.getElementById('word'),
        optionsContainer: document.getElementById('options'),
        scoreContainer: document.getElementById('score'),
        timer: document.getElementById('timer'),
        gameoverContainer: document.getElementById('gameover-container'),
        restart: document.getElementById('restart'),
        pbContainer: document.getElementById('pb-container'),
        pb: document.getElementById('pb')
    };

    var methods = {
        pbCookie: function() {
            var cookieValue = document.cookie.replace(/(?:(?:^|.*;\s*)wg-pb\s*\=\s*([^;]*).*$)|^.*$/, "$1");
            if (!cookieValue) {
                domCache.pb.textContent = 0;
            } else {
                domCache.pbContainer.style.display = 'block';
                domCache.pb.textContent = cookieValue;
            }
                
            return cookieValue;
        },

        rand: function() {
            var i = (Math.round(Math.random() * (names.length - 1)));

            return i;
        },

        pick: function(ar) {
            var picked = ar[methods.rand()];

            return picked;
        },

        printWord: function() {
            domCache.wordContainer.textContent = methods.pick(names);
            domCache.wordContainer.style.color = methods.pick(colours);
        },

        timeout: function() {
            clearTimeout(timeout);

            timeout = setTimeout(function() {
                methods.gameOver();
            }, difficulty);
        },

        timer: function() {
            clearInterval(timer);
            var w = 100

            timer = window.setInterval(function() {
                domCache.timer.style.width = ((w - 1) - 1) + '%';
                w--;
            }, (difficulty / 100));
        },

        printOptions: function() {
            for (var i = 0; i < names.length; i++) {
                domCache.optionsContainer.innerHTML += '<li><button class="option" data-colour="' + colours[i] + '">' + names[i] + '</button></li>';
            }
        },

        getOptions: function() {
            var options = document.querySelectorAll('.option');

            return options;
        },

        clickListeners: function() {
            for (var i = 0; i < names.length; i++) {
                methods.getOptions()[i].addEventListener('click', function(e) {
                    methods.answerAttempt(e);
                });
            };
        },

        answerAttempt: function(e) {
            var attempt = e.target.getAttribute('data-colour');

            if (attempt != domCache.wordContainer.style.color) {
                methods.gameOver();
            } else {
                methods.updateScore();
                methods.printWord();
                methods.timer();
                methods.timeout();
            }
        },

        gameOver: function() {
            domCache.gameoverContainer.style.display = 'block';
            domCache.restart.style.display = 'block';
            methods.restart();
        },

        restart: function() {
            domCache.restart.addEventListener('click', function() {
                domCache.gameoverContainer.style.display = 'none';
                domCache.restart.style.display = 'none';
                methods.updateScore(0);
                methods.printWord();
                methods.timer();
                methods.timeout();
            });
        },

        initScore: function() {
            domCache.scoreContainer.textContent = 0;
        },

        updateScore: function(sc) {
            if (sc == false) {
                domCache.scoreContainer.textContent = 0;
            } else {
                var currentScore = parseInt(domCache.scoreContainer.textContent);
                var newScore = currentScore + 1;

                domCache.scoreContainer.textContent = newScore;

                if (newScore > methods.pbCookie()) {
                    document.cookie = 'wg-pb=' + newScore;
                }

                domCache.pb.textContent = methods.pbCookie();
            }
        },

        startGame: function() {
            domCache.startGame.addEventListener('click', function() {
                methods.printWord();
                methods.printOptions();
                methods.timer();
                methods.timeout();
                methods.clickListeners();
                domCache.startGame.style.display = 'none';
            });
        }
    };

    var init = function() {
        methods.initScore();
        methods.pbCookie();
        methods.startGame();
    };

    return {
        init: init()
    }
}

wg(1750);
!
999px

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