Awesome game! Good submission, didn't expect a racer at all! Shame you didn't manage to squeeze in audio, it would benefit that game greatly I think.
My only critique would be that the haunted aspect does not seem too relevant in the gameplay, imho. I played all tracks winning without ever having to kill a car, I did it kill at last just to see what happens.
Maybe collissions should cause damage or you can push the opponents off a cliff (even if not intended) so that they haunt you more easily... idk