index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>My First Game</title>
    <link rel="stylesheet" href="style.css">
</head>

<body>
    <canvas id="game-canvas"></canvas>

    <img id="layer1" src="./media/layer1.png">
    <img id="layer2" src="./media/layer2.png">
    <img id="layer3" src="./media/layer3.png">
    <img id="layer4" src="./media/layer4.png">

    <script src="./game.js"></script>
</body>

</html>