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

#box{
    width: 100px;
    height: 100px;
    background-image: url(../images/pacmanLeft.gif);
    background-size: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
}

table button {
    width: 50px;
    height: 50px;
    font-size: 40px;
}

table input {
    display: block;
    width: 50px;
}