It's pretty cool but solely the rail collisions are what break it, the direction being reset for you and the camera jittering is just the worst and makes it unplayable, sucks if you hit an odd angle because now you're never catching up with anybody else.
Thanks for checking it out!
I 100% agree that the collisions and camera jitter are a problem - I'll try to release a patch soon and add some fixes for them. However, in the meantime, there's a setting where you can turn off the "dynamic camera" which should fix any jitter but it's not a long-term fix.