Cool game! Really like the idea and the music is too good! 5* for audio easily.
One thing I would say is that since this is a highscore based game it would add a lot if the game saved my best score and it would display it on the death screen. And that would motivate me to try to beat my best score or be competitive with others. Also when you die you should display the score more prominently. The first time I died I restarted the game and thought what a shame that the score display disappears when you die so I don't know how far I got. Turns out it was my fault that I didn't see that despite the menu and restart buttons popping in the small score couner still stays. It's just not flashy and big enough to notice.
I didn't have a problem with the mechanics as some others did. I think the honking was easy to figure out, it was an original an uniqe mechanic and I loved it. Sometimes the game got so frustrating when you were stuck behind a bunch of cars. Especially when your time is running out, you can see the checkpoint but some slow cars hold you back. But I mean frustrating in a positive way. It was great. Altough the honk recharge time could be shorter.
Overall loved it, good one!