In Destroy All Cars 2 you can choose how you're going to destroy the cars by selecting the height of the ramp and the kind of car to be used. As you progress through the game you'll unlock new features and cars. This edition of the game has more cars to choose from in the long run, but just as in the last version you'll only be given a few to start out with. Every level has a unique objective that you have to complete. Most of the objectives require you to simply Destroy All Cars.
You can adjust the height of the ramp by clicking on the arrow keys on the ramp, and when you're ready you can press go. You can also scroll back and forth from the ramp to the stack of cars to get a more accurate aim. Then you'll get to choose the car you'd like to use to destroy the stack of cars. Change vehicles by clicking on the arrow keys on the side of the truck, and click the go button when you're ready to ride. Although you'll be given more cars later on, you still have few to choose from in the beginning of Destroy All Cars 2.
To make your car go, click on the left mouse button after the light turns green. You can monitor the speed of the car at the bottom left corner of the game screen. You may want to adjust your speed accordingly to get the right trajectory on the ramp. To complete the challenge you have to accomplish the objectives given to you at the beginning of each level. Once you've completed the challenge, you're free to advance to the next level, or you can simply retry the level for a better score. If you liked the original Destroy All Cars, then you'll love Destroy All Cars 2.