<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>A-VOID</title>
    <script src="../engn.js/engn.js"></script>
    <link rel="stylesheet" href="style.css">
  </head>
  <body>
    <canvas id="gamevas"></canvas>
    <script src="lib/generator.js"></script>
    <script src="lib/logic.js"></script>
    <script src="lib/graphics.js"></script>
    <script src="lib/main.js"></script>
  </body>
</html>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>A-VOID</title>
    <!-- Use the local copy of engn, fallback to rawgit if needed. -->
    <script src="https://rawgit.com/podiumnet/engn.js/master/engn.js"></script>
    <script src="../engn.js/engn.js"></script>
    <link rel="stylesheet" href="style.css">
  </head>
  <body>
    <canvas id="gamevas"></canvas>
    <script src="lib/generator.js"></script>
    <script src="lib/logic.js"></script>
    <script src="lib/graphics.js"></script>
    <script src="lib/main.js"></script>
  </body>
</html>

Add fallback to CDN version of engn.js.
Add fallback to CDN version of engn.js.
