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

body {
    overflow: hidden;
    width: 100%;
}

#wapper {
    border: 1px solid #ccc;
    margin: 10px auto;
    padding: 20px;
    overflow: hidden;
    position: relative;
    background: url(img/background.png) bottom center;
}

#chim {
    position: absolute;
    background-image: url(img/bird.png);
    width: 40px;
    height: 40px;
    left: 120px;
    background-size: 120px 40px;
}

#score {
    position: absolute;
    color: cornflowerblue;
    font-weight: bold;
    font-size: 70px;
      -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently */
}

#dotTop {
    position: absolute;
    display: block;
    background-image: url(img/pipe.png);
    background-size: 80px;
    transform: rotate(180deg);
}

#dotBot {
    position: absolute;
    display: block;
    background-image: url(img/pipe.png);
    background-size: 80px;
}

#reset {
    content: "Reset";
    color: #fff;
    font-weight: bold;
    border: 1px solid #ccc;
    padding: 5px;
    font-size: 20px;
    display: block;
    background-color: indianred;
    margin: 0 auto;
    text-align: center;
    width: 80px;
    position: relative;
    top: 240px;
}