Really solid!
I just wish there were a difficulty curve, either as a setting or as levels or whatever. Back when you first posted it I was unable to place at all. After playing it a bunch, finally I was able to place in first - but there was no gradual working up from 8th to 4th to 2nd to 1st. If think an easy mode could have less severe curves and no cars, and then you could increase those elements for higher difficulties.
Keep up the good work!