The html code

 

<!-- Place this code where you'd like the game to appear -->
<div class="miniclip-game-embed" data-game-name="rail-rush-worlds" data-theme="0" data-width="640" data-height="640" data-language="en"><a href="http://www.miniclip.com/games/rail-rush-worlds/">Play Rail Rush Worlds</a></div>
<p style="text-align:center;"><a href="http://www.miniclip.com/games/rail-rush-worlds/" target="_blank">Play Rail Rush Worlds</a> / More <a href="http://www.miniclip.com/games/genre-1194/" target="_blank">iPhone games</a></p>

<!-- Insert this code before your </body> tag -->
<script src="//static.miniclipcdn.com/js/game-embed.js"></script>