body {
    margin:0;
    padding:100px;
    background-color: green;
}

body > div {
    padding:50px;
    background-color:red;
}

.speelveld {
    background-image:url('https://images.vexels.com/media/users/3/125822/preview2/cf7a7b3eacd8a11c892f58a36306e891-illustrated-clouds-background.jpg');
    background-size:cover;
    height:400px;
    position:relative;
}

.player {
    position:absolute;
    left:50px;
    top:30px;
}