I might get banned or telling this but here we go:
Those are the steps to go for the secret
1-Download PlayerWorlds at Graalonline.com
2-Setup graal
3-Log in as a guest
4-Click start at left corner(not your computer's start,the Start at the game.
5-Click Install Packages
6-Install the Developer packages:Level Editor-Developer tools
7-After you have done the installation,click YOUR start and search:Graal,Open the FOLDER
8-You will see what I am talking about......