This one was really fun! As a fellow enjoyer of Initial D, I enjoyed the references and music. The animations and expressions were also really well done. The gameplay was also fun.
However, there are a few things of note.
First of all--while minor--people unfamiliar with stick shifts (like me) will have a hard time figuring out what to do. Having some sort of in-game tutorial would immediately remedy this issue. Though, I'm glad I stuck through the learning curve.
Also, the rounds last for what feels like forever, and given the minimal amount of mistakes the player is allowed to make, this can be quite frustrating (I never ended up finishing the second round because of that). Having a clear indicator of how far along you are would really help with this. There also isn't much gameplay variety between the two rounds I played as well. Even a simple difficulty curve with the amount of time you have to input could fix this.
Despite my criticism, I really did enjoy this game! I think that, with a bit more polish, this game could be even better! Great job.