index.html

<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1">

        <style>
            body, html { padding: 0; margin: 0; overflow: hidden; }
            #skeletonGame {
                margin: 0 auto;
                width: 480px;
                height: 480px;
                background-color: black;
            }
            canvas {
                margin-top: 20px;
                background: #fff;
            }
            @media all and (max-width: 480px) {
                #skeletonGame {
                  width: 100%;
                  height: auto;
                }
            }

        </style>

        <script src="game/phaser.min.js"></script>
        <script src="game/game.js"></script>
    </head>
    <body>
        
        <div id="skeletonGame"></div>
    </body>
</html>