1/5
This game is incredibly derivative of pretty much every other basic driving game: win races, get money, upgrade car, win harder races. There's nothings special in the execution. There's some decent ideas (having some alternate events) but they're executed horridly. The difficulty between actual race events and the others are drastic. Given the number of handling based challenges the complete lack of a handling upgrade is downright stupid.
If this was at least at par with other games of this type, it would be ok. But if you're going to do another game in a bloated, tired, genre, either do something special, or execute flawlessly. This one fails in both regards.