I think you guys did a great job, for what it is and given the amount of time you had. Sure I would go with a different color.....like AW, but it's a show car meant to stand out in a crowd and say "look at me". I like your thinking on the rear lower facia. With some refinement, I think that could be cool. Also, a very interesting treatment on the lights and "grill" in the front. I would tend to maintain the black but I really like the led lights and how they tie into the headlamps. Definitely I would do different wheels, but again, it's a show car. Great imagination implementation!
I'm hoping two things: that the OP was serious about good or bad feedback, and that the car color is either photoshopped, or plasti-dipped. Otherwise, I agree with above, not good on wheel design and not good on color. jmo