Thanks a lot!.
The speed gauge was planned. I also draw the texture behind the wheel for that purpose; but I didnot have the time to implement it.
I also considered what you said with the controls. At first the joystick was only used to right and left, while A and B buttons for up and down, but it didnot worked for me. What I really wanted was to control the car by handling the virtual 3D wheel of the car, but I did not have a clear idea of how I was going to do that.
Thanks a lot for playing the game and your comments!