Currently, you can run a Practice session, a Race session against the AI or a Time Trial session...I think that's the three modes. Remember, it's still in it's infancy in a lot of ways...there'll probably be more features as time progresses.
Hell, in it's current condition, it's probably worth the price of a full game in some ways.
"Sometimes I wonder whether the world is being run by smart people who are putting us on, or by imbeciles who really mean it.
"Politicians are like dirty diapers. They need to be changed often and for the same reason.
"I do not suffer from insanity. I enjoy every, single minute of it."