I want the car to move automatically, left to right and I want to be able to control the blob using the keyboard.

See here for an example:

www.robster-lobster.co.uk/DodgeCar.exe

I have tried assigning it an X and Y axis like I did with the car but then I get some weird error message (see pic 2).

www.robster-lobster.co.uk/code.JPG

www.robster-lobster.co.uk/code2.JPG