More luck than skill
The game becomes more difficult as you play and unlock and upgrade faster cars, again, just like that ball dropping game kept getting faster.
How do you add more challenge to the game?
They could have added more difficulty by making tracks with more curves or adding drift or boost mechanics like proper racing games like need for speed or asphalt do.
Instead, they added difficulty with annoying pillars on the road that significantly slow you down if you hit 2-3 of them in a row. These pillars are everywhere and almost impossible to spot on a scrolling screen in topdown perspective. Add to that game modes like pursuit where other cars are intentionally bumping you into those pillars all the time and it becomes one big annoying grind to complete races. This is the lazy way to do a difficulty curve.
The more you play this game, it becomes less about skill and more about luck. Add more interesting curves and more interesting driving mechanics instead of these annoying pillars.