Well, rayne, look up congradulations at urbandictionary.com. It it a combination of congratulations and graduate. By the time you reach that frame, you have graduated from my tutorial ... well, no. That was a mistake. The graduate thing was just a coincidence.
On flash, the semicolon is optional and does the same thing as if you start a new line, meaning that jumbled-up code might paste to the document with with new lines starting in the wrong places, or the entire code will be on one line and is too hard to modify. I suggest you organize the code and update the tutorial with the code inside it.
make the, "play again" button static unselectable, bring th crosshairs to the front, add more elements to the game to make, make more levels, learn how to code, and get more creative.