One Track, One car- "Cygnus Car Engine"

you can set the rear view mirror to something more to your liking. The current setup is so it will run on lower spec systems.
in the .ini file the current default is:

MirrorFPS=20 ;Frame Update of the mirror.

To chamge the number of cars, change:

Cars=6

I recall that we had 12 cars running quite happily on our better systems.