Update 0.5.1

Yep, that's right, this update took only 8 hours to make, but it does add a feature that I'm very proud of!

Gameplay

• Added ability to race against a ghost from a demo

Audio

• Some slight audio effect improvements
• Tire screeching sounds a little bit better now

See you next update! I know it's not the 1.0 that I promised, but still