I liked this game very much. The simplicity of the mechanics and the art style, paired with the classical music (an excellent choice by the way) playing in the background, really sells this for me. Really accentuates the droningly menial aspect of parking a bunch of cars in a way that makes it fun. Also, the alliteration is very fitting.
I would say that, for me, it wasn't clear that running into other cars affected your score. Perhaps a physical indicator -- like dents in the car -- would make things more obvious.