app/embed.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="mobile-web-app-capable" content="yes">
  <link rel="stylesheet" type="text/css" href="asteroids.css">
  <script src="//cdn.firebase.com/js/client/2.0.6/firebase.js"></script>
  <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <script src="assets/vector_battle_regular.typeface.js"></script>
  <script src="anchor.js"></script>
  <script src="game.js"></script>
  <base target="_blank">
  <style>
    body.embed {
      width: 100%;
      background: #000;
    }
    .embed canvas {
      border: none;
      margin: 0;
    }
  </style>
</head>
<body class="embed">
<div id="asteroids">
  <div id="game-pane">
    <div id="game-container">
      <canvas id="canvas" width="900" height="700" style="border: none; margin: 0; max-width: 100%; max-height: 100%"></canvas>
    </div>
  </div>
</div>
</body>
</html>