when going from walk to run i suggest using:
Animation.CrossFade
info on it: http://unity3d.com/support/documentation/ScriptReference/Animation.CrossFade.html
you are
Te road 2
left click - hazard
scroll wheel - speed
right click - random car
all cars dead - confirm if you want to start over
pre play - menu with lots of options
 "Foxy Sniper 2"){kind=icon}
 "Flight"){kind=icon}
 "Combat Extreme"){kind=icon}
 "You Are The Road - Molyjam 2012"){kind=icon}
 "The Douchebag Life"){kind=icon}