Sometimes it's FarceBook, and other times its the capability limit of your computer. This game seems simple enough that it shouldn't be taxing your computer.
If you have an older computer, windows XP or Vista, and you just turned it on before trying to play, it may still be starting up other programs such as Skype or Anti-virus or others, give it a couple minutes before trying your game.
Another thing some people do is get impatient and hit Internet Exploder or Firefox or Chrome multiple times when it doesn't start right away when they first click it. In that case your computer is trying to run those multiple times and slows down your whole system.
Here is MegaZebra's suggestions:
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.
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.