It's interesting idea to make something else - an arcade track.
But then I would have some comments if you let me:
- it's impossible to guess which cone is "current" - you shoud add some skidmarks or even arrows on the track's surface that could show the right direction. Something sophisticated, yet visible... Or hire some better co-pilot for me
- the walls surrounding the track - they can not look like on the picture
- also the track's surface looks terrible for me - it's very wide, so you can use couple tracks (roads) in a row, then they will not stretch that badly. Then you can add a minimum randomness to them to make it feel like a surface (the Material Editor could be helpful.
- make objects collidable or use some different collision columns - there are not many objects and it will not hurt the performance. Now I have around 90 fps and my machine is not very fast.
- you can also use some objects from others xpacks (not just Default)to make it look more interesting /start with spectators, I guess
So, I guess you can work little bit more and it can be nice "other" track