* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    text-align: center;
    margin-top: 100px;
    background: black;
}

h1 {
    color: yellow;
}

h2 {
    color: white;
}

#game {
    font-size: 0;
    margin: 10px auto;
    width: 400px;
    position: relative;
}

#world {
    display: block;
}

div.row div {
    width: 20px;
    height: 20px;
    display: inline-block;
}

div.brick {
    background-image: url('brick.png');
    background-color: black;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

div.empty {
    background: black;
}

div.coin {
    background-image: url('coin.gif');
    background-color: black;
    background-repeat: no-repeat;
    background-size: 80%;
    background-position: center;
}

div.cherry {
    background-image: url('cherry.gif');
    background-color: black;
    background-repeat: no-repeat;
    background-size: 80%;
    background-position: center;
}

div#pacman {
    background-image: url('pacman.gif');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    width: 20px;
    height: 20px;
    position: absolute;
    top: 20px;
    left: 20px;
}