Played it for a bit on my phone and PC,but 3 things
1.I think the controls could feel a little more responsive,you might want to experiment with that a little.
2.Putting sound effects for things like UI buttons,when you start moving left or right,when you start the game ,when you collide with other cars etc and putting a particle effect when you collide with another car.I think both would make the game feel much more better to play.
3.On PC,the controls where pretty obvious,but it took me a few tries to understand the controls so I would suggest some indication of controls for the first few seconds eg: https://imgur.com/eNtVU8t
I think the scenery surrounding the road added quite a lot to my enjoyment compared to a dull flat plane.Sorry this might seem a little rude,I did enjoy the game though and my advice might be useful.