The compulsory screenshot
Do not worry, an unlimited stack of industrial-strength floating-point precision stages awaits, no more than a git clone away.
You, a colored dot on a racetrack, must complete a number of laps before some other poor bastard, the other colored dot, completes a similar numer of laps. (Remember to agree beforehand on the number of laps to run, as well as the direction....)
The compulsory screenshot
The game, while still very beta, highly unstable and broken in many ways, is still a rather good waste of time.
To get a copy of the code, simply run
git clone git://mysecondfacetube.dk/vectorrun.git
This should give you a nice folder called vectorrun. From inside that, simply run ./vr.py stages/foo.xml where stages/foo.xml is the racetrack.