This is a easist race game, but you can experience doing it best, that is the same in a big race game. It dose not contain any item purchased in game. You can exerience 3 mode in the game. At first, take the easy mode, after you get use the game, and then take normal, and hard mode. Even this is a samal game, but I expect you can get all the achievements and go to top of the ranking, can you?
Ranking - although it is a single player game, it need network to upload your score and get the ranking list from internet. Take it easy, it dosent matter without network, even though you cant get any ranking information.
Achievement - At the begining, we provide only 4 achievements, and next time upgrade we provide more achievements. thank you!