BumperBall Game

Hello,

I am trying to make a game in C# that its like the BumperBall game that is in www.bumperball.com .

I already finish the ball bounces and moves programming.

I would like a little help with the car programming.. how can I rotate the car every key press a little (like 1 degree per press)  pressing the left or the right key like it is in the original game, I success only move the car 90 degrees every key pressed.

Thanks in advance