First game-Need some help

Hey you guys, I am working on my first game. When finished the game will be this: There a five green balls and one gold one. The green balls bounce around the screen, whenever you are over them you lose points for the amount of time you skim over them. touching the ball will get you 2 points. Level one the goal will be to collect say…5 points in 15 seconds. Etc…

However I am having some problems. I cannot move on to the next level of my game and I am very unsure as to how to set up a new level. I just started with flash a few days ago and I really need some help. Check out my source and tell me what’s up please. Also, being able to restart the game after you fail is somthing I need to know how to do.