Really enjoyed the game, actually finished all the levels, really love the menu that mimics the Nokia regular menus, the little touches like the tire marks and sounds once you reach a certain speed.
When it comes to the level layouts, level 5 gave me a little bit of trouble as I wasn't sure I could cross the line to the left of the parking spot. Similarly, in level 8, I expected I had to go left instead of right as the last turn. Additionally, there was some empty space there that made me believe it was the right way to go. In general, the unpleasant losses were due to hitting something that wasn't visible in the screen I was currently on. However, I got through all the levels! 10 took me quite a while to adjust the car.
I also identified two technical issues - on Firefox, the size of the phone's screen doesn't scale up. Also, after failing a level in the 'Replay Levels' option, the failure message shows up. You can rapidly skip it, but if you do, after a few seconds, regardless of what you are doing, you will be sent back to the main menu.