I lost quite a few times, mostly due to the extremely high sensitivity. Even when I just barely tap the turn key I go straight into a wall instantly.
Biggest suggestion I have for feedback would be to make the backing up faster. Since you already get a time penalty anyway for hitting a wall, I feel like there's no sense in making the player wait a few seconds for a slow backing up animation to finish playing. Also, sometimes I got a black screen of death instead of respawning, although I'm not sure what caused this.
Despite that, I did manage to beat the last level and get Employee of the Month. My advice for Bob would be to get a better car. xD