good job man. i like the model it just needs some refining
red - those creases need to go away
yellow - smoother here
blue - i'm not quite sure about this but i think you have to set this line higher
about the sexiest part of this car - the rear end
imo you made it too pointy and too long. it seems to me like you would have to push in the rear bumper inwards more or it's the fault of the camera angle.