Seeing as this is quite clearly jumping on the Park-a-lot and Park-a-lot II bandwagon, I cannot help but feel obliged to compare it to those. What you've done here is not that bad, the game concept (though not original) works well, and I found myself playing for a few minutes or so.
Having said that, the crashing effect is non-existent, and I regret that it doesn't quite act as a replacement for what it mimics. 3 stars as you have done a good job, but try to come up with something original! Add some variety to the host of games out there!