Solid game, it was a bit annoying as the other cars appeared to wrap around as the drove of screen (I know they didn't but it looks like it) and then when you as the player hit the edge is a bit of a surprise. It seems the player and police are slightly up scaled which for the player comes from the select menu (the menus are really good nice and juicy and interactive) i would scale the cars down to normal size as they do initial drive out. Another thing that has been made easy in Gdevelop in the last year is a leaderboard this obviously adds a lot to this kind of game so or you can local save a running best score fairly easily which is always nice for replayability :).
Viewing post in Demolition Derby jam comments
maybe try a transparent lighting effect with simple animation would make the police car pop out and look cool. I get what you mean about the player and could see you can lose it among the cars on screen.
Perhaps if it is helpful after the comp you and I can exchange or game files so we can take a look and learn bits off each other. I really like your smoke effect and trails 😎