fix mobile issue

Author: luizbills

README.md

@@ -7,4 +7,4 @@ Try on https://litecanvas.js.org/
 ## Playground tips
 
 - https://litecanvas.js.org/?reset=1 cleans the backup code (stored locally)
-- https://litecanvas.js.org/?autorun=0 prevents the code from being executed immediately (only on large screens)
+- https://litecanvas.js.org/?autoplay=0 prevents the code from being executed immediately (only on large screens)

public/index.html

@@ -179,7 +179,7 @@
       </div>
       <div class="game">
         <div id="frame-overlay" hidden style="display: none"></div>
-        <iframe id="frame" frameborder="0" src="preview.html"></iframe>
+        <iframe id="frame" frameborder="0"></iframe>
       </div>
     </div>
   </body>