The objective of the game is to get to the finish line in one piece. Hence, you should try all the necessary means to keep your truck from crashing. When you fell on your back then your truck will surely crash and you can’t come back on the road.
Your truck receives damage every time it bump into something so you will need to repair it once in a while. There are floating wrenches on the road and these wrenches are great for repairing damage. Use the left and right arrow key for balancing the truck so it won’t fell on its back and explode.