Code Racer is a fun racing game which ditches the use of cars and throws in the use of web development programming skills (HTML and CSS).
This online game was developed by Treehouse and it allows users to race eachother using their Facebook profile to see who can finish each stage of coding the fastest. The game becomes a bit more robust with the use of weapons to slow your opponent down. I have never used said weapons though. The player who gets the most levels complete wins.