1. What is a polar bear doing on a grassy plain? Put it on it's natural habitat, it might get you extra score.
2. The car is moving kind of too slow. Maybe you can try what I did and move the car with the hand tool and then quickly pause.
3. On the contest's forum page, Benji told that you also get bonus points if the animal moves or something like that. On the contest entry with the cat, Benji told it's creator to make the impact realistic.
Still, the bear looks great. I think you are going to have maximum points for looks.