Edit in JSFiddle

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Game Example</title>
    <script src="//cdn.jsdelivr.net/npm/[email protected]"></script>
    <script src="game.js"></script>
    <script src="publisher.js"></script>
</head>
<body>
<div id="game"></div>
</body>
</html>