I got to see DrawRace 2 in action back at GDC this year, and it's a wild one. The title is a racing game at heart, but it plays unlike any racing game you've ever seen: Instead of driving the car around the track, you actually just draw a path around, dictating where the car will go, when it will turn, and how fast it should move. You have to still use the same rules as driving, however, as you push your finger around. Move too fast in the straights, and the car will spin out when you try to go around a curve. Or hit the side of the track accidentally, and you'll lose time in the race.
It's a weird concept, but the execution makes it work anyway. The sound is particularly notable -- as you guide your finger around the track, you can hear the tires squeal and the engine growl, so the experience is very much like actual driving.
Fortunately, at just US 99 cents, it's not a big risk to download the app and see what it's like. Chillingo is publishing this RedLynx-developed title (RedLynx also worked on the popular Trials HD game on Xbox 360), so there's Game Center support, lots of content and challenges to play through, and plenty of the polish that the publisher is known for. If you like driving or racing games, or just want to try out this crazy interface, definitely give DrawRace 2 a look.