A very great idea and hats off to making a 3D game.
Unfortunately, it was often very difficult to keep your bearings due to the mouse controls and a short description of the controls would have been helpful, as you didn't know whether you could accelerate or decelerate (especially because it was extremely fast in between and then very slow again).
However, I thought it was good that you included more than one path so that it didn't get too boring.