It's certainly not the N Game, but it is an object-oriented flash game...and I made it by myself (almost)! Now if I can only remember how I did it to show Web Design class next week.
Really its just a single player Pong game. The ActionScript code was borrowed and modified to work in Flash Player 7. The class has a strong interest in athletics so I'll encourage them to make a soccer or basketball version. I'm planning to spend an entire week on this project since the guys don't have any programming experience.
I also dug up a couple other flash banner ad examples I made last year: Egg Drop Soup and Lobster Tank