Hi,
I just tested the demo a bit and there where some things I think you could make them better:
Car animations:
It would be great if te wings of the car were animated when in the air and controlling the pitch.
Engine sound:
The current engine sounds like an Lamborghini in GTR Racing Game and the pitch doesn't represent the rpm of the engine (should be higher). I think it rather should sound more aggressive and less synthetic.
Turbine sound:
The turbines should also sound more powerful. When starting there should be a sound of turning up rotors with the blasting sound after it. One should be able to feel the power Camera vibrations would also be a good additional effect.
Camera movement:
The camera is sticking behind the car, what ever happens. When it's rolling over, the camera partially gets under the track. So it would be nice, if the camera stays in a constant position in these situations.
Nevertheless, I think I will buy the game. You are doing a good job and I'm sure it only gets better.
I hope my "Germanized English" is understandable.
Greets
Hensch