Game Help!!!

Hello all, I know this is my first post, but I need some big help. Me and my friend are designing an educational game for my Web Design class. Most other people just copied some tutorials, but since we play a lot of games, we wanted to make it fun. So it's kinda hard to describe, but it is most like this game: http://www.funny-games.biz/elona-shooter.html

It's going to be for American History, four characters are going to be lined up to the right behind sandbags with a flag behind them. You control one of them, as waves of 4 at a time, enemies come toward you, a messenger comes up to you and a asks you a question, it appears on screen, and above each enemy an answer choice appears. You shoot the one you think has the right answer. Each correct one raises the flag, each wrong will will probably lower it.

We are doing it in Flash 8, with Actionscript 1.0 & 2.0, we have one week to finish our coding, we have no idea how to get started. Please help. Here is what our "game" looks like so far.

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