Mater National wii game

Santa brought a new Wii game for our son Mater National. He is having so much fun running into everything he'll never beat the game if you don't beat the game at the first level you can't progress to the next as far as I can see. So you start out racing Lightning Mcqueen across Radiator Spring's desert area. There's so many dead ends I myself am having a hard time following the track to teach him.