anchor.diff:    <%= script_include_tag 'game' %>
   
     <%= script_include_tag 'yeah/web/start' %>
  +
  +  <script>scaleDisplay()</script>
   </body>
   </html>
  
positive.code:   <title>Game</title>
  
    <style>
      body {
        background: black;
        margin: 0;
      }
  
      .center-content {
  
negative.code:       box-align: center;
      }
  
      .hidden {
        display: none;
      }
    </style>
  
    <script>
      function scaleDisplay() {
        var canvas = document.getElementsByTagName('canvas')[0],
  
            width_scale = window.innerWidth / canvas.width,
            height_scale = window.innerHeight / canvas.height,
  
            scale = Math.min(width_scale, height_scale)
  
            width = canvas.width * scale,
            height = canvas.height * scale,
  
            sizeStyle = "width:"+width+"px; height:"+height+"px";
  
        canvas.setAttribute('style', sizeStyle);
      }
    </script>
  </head>
  <body class="center-content" onresize="scaleDisplay()">
    <canvas></canvas>
  
    <div class="hidden">
  