Designed to coincide with the release of Unity 3.5's open beta in December, arcade racer Tail Drift has been named as the winner of the firm's first Flash in a Flash game creation contest.

Microsoft’s Joe Belfiore tweeted today that Drift Mania Championship 2 is the first game on Windows Phone to feature the Unity engine. The game runs for $1.99 with no trial and weighs in at 200MB.