Love the audio and the art style, can see that you are cloning the game into your own style. I agree with Cooper that the trees move to fast, maybe tune the accelaration a bit down in the beginning would improve the movemnt.

Audio is realistic. Awesome. But there is a gap between low speed and high speed. 

The trees move too fast towards you. It is kind of hard to perdict. 

AI is great. The difficulty is right on.

The transition looks very cool, got the feel of original game.