Car Clicker is an offline game where your can race again opponent so you can unlock more upgrades that you can buy with your Car Clicks. to gain more points you have to click the car or race with it when your think your fast enough.
In the car shop you can purchase new and faster cars if you have enough Car Clicks.
When your arrive at the racing track, you can race against opponents and see which car is faster. If you cant beat your opponent, just buy some more upgrades to make your car faster to beat your opponent.