The objective of the gate is to get to the finish line as fast as you can. The obstacles are the mountains which you must pass in order to get into your destination. This is a racing game so expect that there will be other trucks that will compete against you.
Aside from you, there are four other trucks which you must outrun to win the game. The game I easy since all you need is to outrun all the other trucks, but you need to be careful as you might crash while running fast. Upgrade every time you can as you will need it in the next race.