A minor update, since the work-in-progress course "Pipe Plunger" apparently needs more testing.
Motion blur is in the game. You can disable it in Options > Graphics.
Many models have been tweaked or otherwise optimized. Some courses have, too (see: Spinswagger Speedway). Also, bug fixes, including a couple nasty ones.
New course soon. ...if not the pipe course, then some other course.
Happy Tiring!