First impression:
VERY NICE UI, START SCREEN, AND SHARE OPTIONS!
THE LOCATION OF HIGH SCORES ON THE SCREEN IS GREAT!
THE LOCATION OF THE GAME FIELD AND HOW IT IS CENTERED IS GREAT!
-I think MAYBE the collision on the back of PLAYERS car should be a little more forgiving, at least starting out. Most of my deaths on my first few matches were from switching lanes when I thought I was safe, but the back of my car hits the front of the passing car. I thought I was safe, that's why I turned! I think new players will have the same problem on the first 3 games and get immediately frustrated. But after 2-3 games I got used to it and from then on, my next 10 games and losses were from legitimate crashes into vehicles. So yeah, maybe a slight modification, or perhaps it's not worth it.
-The arrows on the title screen seem like they would do something, but they don't.
-I think a switching lanes animation will take the game to the next level and have it on par with the quality of the UI. I imagine something like [on left= change angle 88, wait 0.05, change angle 86, wait 0.05, change angle 84, ect. ect. until you reach 70 or 75. You could also do increments of 5 for less smooth animation. but importantly at the end of that series adjust it back to strait up 90, but IT HAS TO BE at a faster rate. So as a result of all that, your car ends up with what can be described as a 'Swurve' or 'quick turn' animation. I'm still a noob, but that's how I would do it. It's just a quick smooth SUBTLE animation but it adds to the polish, and your game is no longer 'Press left to TELEPORT into the next lane'
-Another subtle animation to trigger on either only the player car OR both the player car and the car that was wrecked into. I would simply take the sprite into photoshop and make 3 or more iterations. First slightly damaged, second more crunched, 3rd destroyed. So together it becomes a little animation. To have the crunching effect maybe you can add 'cracks' to the car at 50% translucency and skew and resize the front of the car to make it more and more 'flat' for each frame and the end frame your car is 60% of it's normal size since it's crunched up from crashing. So you make the animaton trigger in Construct, and just add 'wait 0.5' seconds before destroying both sprites and maybe another 'wait' before making the explosion happen.
Anyway, cool game. I think we have something in common that we both have those clean UI skills before any game making even comes into play.