As what Blink-the-God said, the controls and camera ruin the game since it's just too slow just to turn around, couldn't you move the view with your mouse and click to throw your projectiles at the cars since it is more easier. Also you can only move forward and jump, why couldn't space be jump instead of the s or down button. Also, make a variety of vehicular enemies like rigs and convertibles maybe a helicopter as a boss to add some spice into it. Also can the camera have a lock on since it is annoying when the girl body blocks the view. The shop prices are laughable since who is going to spend all their time playing this and many players are impatient usually. Also add a crosshair for the mouse to make it easier to shoot enemies.
The game has a great concept but if more time was spent on it, then more players would be have fun...