Hello.
What I like:
- The music and audio.
- The low-poly cars.
- The type of this game ( endless-runner-ish )
- The menu and that here is a tutorial.
What I think can improve:
- The game does not really fit the theme ( in my opinion )
Suggestion:
- Add a high score system. Since you are using Unity, just take a look at PlayerPrefs.
- The mechanic of clicking Space when you are near other cars is poorly explained. Try making it more clear.