2 quick questions

1.) in my game I want the game to move on to the next level when the player collected an additional 300 points. So I have variable name "Score" that contains the previous collected points. what is the condition code that I can use for adding the points and then moving on to the next level. can you give me an example?

2.) How to tell flash to remember that last played level? So after the played quit the game flash will starts playing from the last played level.