Added the "Unclickable" Exploit.

src/index.html

@@ -603,6 +603,8 @@ if (htmlWebpackPlugin.options.googleAnalytics.trackingId) { %>
             <p>If the game fails to load, consider <a href="?noScripts">killing all scripts</a></p>
         </div>
     </div>
+
+    <div id="unclickable" style="display: none">Click on this to upgrade your Source-File -1!</div>
 </body>
 
 <!-- Misc Scripts -->