TorterraIsProgrammer Jun 23, 2014

I'm not a pro at flash, but I think I can help you. (If you're in AS2.)
At the last frame of your timer, you should've written this :
_root.onEnterFrame = function(){
if(score >= 500){
_root.gotoAndStop(4);
} else {
_root.gotoAndStop(5);
};
};