So I am going to sound rough but its not meant in any mean spirit. I applaud your effort, I'm sure it took forever to make, but the size of the file is crazy for what it is, not sure how you can improve upon that. The race itself is really basic its just 90 degree turns needs a lot of improvement there its just not fun. I did enjoy seeing all your hard work though I can tell you put heart into this. So I will give you 5 stars. Its just not for me.
When I started doing this I never imagined this would one day be available online but here we are.As I have said else where I don't want to change too much as then it wouldn't be as it is in the real world (this is not a rant),having said that I am open to ideas to make it a better experience for everyone.
Yes there will be an update probably a full re-install will be required.
Can you tell me what type of car's you have driven on track and expand on "to fix things".
Am working on moving collision walls back a bit at the moment.