First, try to reload the game. Second, check if you have the latest version of Flash Player. Third, delete temporary files such as cache and cookies. You can find the instructions here. Try to switch to a different browser, such as Google Chrome or Mozilla Firefox, and check your internet connection.
If none of the above worked, try to open the game and scroll down at the bottom of the page, where you will find a link called “Report a technical problem”. Please use it to send us a report and we will investigate it. Don’t forget to write us a few details and to let us know if you tried the above. This way, the process will be faster and you will be able to play again sooner.