The graphics are nice... nothing all that unique, but still nice.
The controls are too loose, though. Does the car slide around so much because the terrain is sand? Will you have more precise control on different maps that have asphalt?
(the game stopped progressing once I reached 14 kills... but that's intentional, right?)
It's a demo so I shouldn't nitpick too much, since the whole point of a demo is just to give a basic idea of what the final product will be.
Good luck!