A cars' most vulnerable place is it's side. You can earn a lot of points for that. Also, try not to get the gasoline because it can just make your driving worse and you can drive to the wrong side (unless you can handle that easily). When you see a bomb, try to get any car around it. This will only work if you are alone with another car. Do not get so close to the bomb, it can ruin your chances of going to another level.

 

If you drive your car backwards it takes less damage to the engine when you hit people.

 

Always try to bash the cars into a corner. Every time they hit the wall they lose 5 points so if you hit them and they hit the 2 walls in the corner you get the job done 3 times as fast!!!