The only effective strategy is to flee, wait until every car but one breaks down after running into each other at the same time, and then keep away from the last remaining car into it crashes into something. Without that strategy, it's too hard and with that strategy it's unchallenging and depends entirely on luck or patience.

Is it meant to be that type of game?
Yes.

....well, you can't just wait, as they come after you. And I would have thought it's not entirely luck, as you need to dodge the other cars. It was supposed to be a case of position your car so the opponents crash into each other. However, it didn't quite work as well as I had hoped.
Thought about going down the route of your car is stronger on the front then the back, so if you hit someone, you do more damage or get points, but I wanted to keep it as simple as possible.
Any ideas on how to spice up the game play strategy would be greatly appreciated.