The objective of the game is to get to the finish line in one piece. Take note, one piece because it is so hard not to crash in this game. Take one small mistake and your truck will crash. The game maybe about monster truck, but you also need to be as careful as you can because you too can easily crash in the game.
While you are on your way to the finish line, you can also collect the stars floating around the road. The rule is here is to destroy cars, but not to the point that you will compromise your safety.