I saw many comments talking about terrible controls and huge slowdown when hitting walls, but I'd say this is why I love this game so much.
I had to take the time to understand the physics [The video really helped], smashed walls again, again and again, but when I started to understand, it was really easier to pass every type of turn. Since the game is quite difficult, it's so rewarding when you make a precise drift, and what a joy when you make it until the end without a major crash!
For a free racing game, there's a neat amount of content : Plenty of tracks, plenty of vehicles, and even xp system. Put that with such hard-to-master gameplay and you got quite some time of content!
The thing is, one could still not be able to handle its car after an hour of practice, which could make many players uninstall. As fun as it is to play, if one isn't patient enough [which is quite common nowadays], it will just drop the game off because too hard...
...And that would explain why I'm already ~30 in leaderboard with bronze medal on first tracks
I'm also very happy that the graphics are that simple. It gives a fun retro style, but more importantly, it runs flawlessly on weaker computers like mine.
I hope the many negative comments didn't affect the game too much... Definitely worth to play for someone who don't fear to spend some time to learn the physics.
EDIT : To anyone who thinks drifting is hard, it's really easy compared to "nodrift" cars. In drift stages, at least, the difficulty is to keep the car on track with max speed, so drifting well is already enough to get a good score... but in no drift, as the car is stuck on the road, getting medals requires managing the speed with an extreme precision that's way harder than simply drifting.