5 stars: I have been played for a while now and I have unlocked many buildings, cars, drivers and mechanics. There are many things to discover like races, upgrades to the car, parts, skills and more to keep you playing. One think some descriptions need to be added, mainly in special car parts because you don't get what they do and the wiki is outdated
4 stars: Fun game but barely loads. They have 4 ads programed into starting the app that seem to fight with each other and prevent the app from launching. Usually take 15-20 tries for the game to successfully start up.
3 stars: Besides cramming an ad into your face before you even start playing, its a great little technical game with many game mechanics (haha). This makes it enjoyable, but can add to the clutter on the screen and everything popping up into your face as click bait. One of the major downsides is how nearly everything is up to chance. You can upgrade skills and such, but that only gives you a better chance. Still just a chance...
3 stars: Real quick, the ads are covering the important interface. The brakes, boost, and aura are all covered. I can't click it without being redirected to another app or site.
2 stars: The game is alright, but you can't do much or as much as you would like to, due to mostly everything necessary for gameplay needing to be bought with actual money or the in game equivalent to gems which you don't get much of and everything is ridiculously expensive with these. It's just not...