Hi samueldora,
That particular example in the GUIWorld on lines 53 and 54 requires the most recent version of Greenfoot (version2.0.1). Greenfoot added a new constructor to the GreenfootImage class with the latest version. You could comment out or remove those two lines if you do not want to upgrade your version of Greenfoot.
2011/1/30
GUI World
2011/1/19
Greenfoot Jeopardy
2011/1/19
Greenfoot Jeopardy
2011/1/19
Greenfoot Jeopardy