Design a Flash Game

I need a basic flash game made for a Highway Safety client we are working with. The game must include a car driving on the side of a semi-truck. The user must press the "enter" key when they believe they've entered the truck's blindspot. It's a very basic game. I need the ability to have the points counted so that we can know who has the most points at the end of the year. The user must be able to visually see how many points that they have acquired. If we could have it gradually increase in difficulty over the course of the game, that would be ideal as well. Let me know if this is possible.