Topdown racing! Good to see this type of game again. (I know I am old) The game feels very nice, the driving is smooth, and the upgrade system is nice too. The difficulty is a bit high but it's very fun and challanging. Loved it! The last engine really is a beast though.. got it through the bug you've mentioned but tried it regardless.
Not sure what to say, except maybe adding a bit more variation to the map/adding different maps to play with. Speaking of maps, the first turn in the map is really unforgiving, and I think is the second hardest turn in the game. This first one being the parking turn for sure.
Anyway, well done! I had a really good time playing