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.
I am grateful that you like the filter but the pure script and lighting handling with C13Aegis is way more advanced than mine
I'm currently using a modified version of a default Pure script, which is not the greatest but gets the job done.
It's more of a preference and you shouldn't be hating on other modders just because they charge for very high quality content that has been years on development.