Circuit Lap Racing Game using Flex 4?

Are there any resources where I can learn or possibly see a sample of a simpl开发者_StackOverflow社区e circuit-type top-view racing game using Flex 4? Also, please provide pointers of things to consider when planning to making something like such.

It doesn't need to be multi-player, the users will go against pre-programmed AI racers then after the race, the user's score will be submitted to an online high-score table. The submission of high scores can easily be done by calling a PHP file from the server.

Flex 4 is not for game so I don't think you will find any example