If your family is the kind that goes do demolition derbies, that is.
Use the arrow keys to control the weight. There are more cars as you advance in levels, and your weight also changes. You end with a 1 ton spiked stone.
:hint: hit more than one car in the same blow and you get a point multiplier for that blow.
:hint: you can also damage them just by staying in their way as they come.