The objective of the game is to get to the other side without flipping over. If you do flip over, you need to go back to the starting point minus one of your lives. You got three lives to finish all the levels in the game. This is one of the most badass games because the game actually lets you enjoy crashing every car, and anything on your way.
You can use the arrow key to move forward or backward and to prevent your truck from crashing. Play it and you’ll know why it got the title of Demolish Truck.