iDrunky [iTunes link] is an iPhone app with four sobriety tests that mimic U.S. police officers' roadside DUI tests.

Each test comes with written instructions as well as stick figure diagrams in case you're, ah, having a little too much fun to concentrate on those sentences.

Our favorite is the "Where's Your Nose?" test, which challenges you to lean your head back and touch a point on your iPhone screen to your nose. "Try not to fall over," the app advises (which, of course, you're likely to do).

The design and the challenges are all simple — don't expect to find any spectacularly innovative use of the iPhone platform here. But for $0.99, the app provides at least a few minutes of fun at your next house party.

"Our goal is to fill the party niche," explained the app's designer, Alec Brownstein (whose creative jobseeking skills we profiled a few months ago). "It's not a serious app, just a fun one to play around with at a party for friends."

Brownstein worked with designer Jon Stern and a developer in Croatia to produce the app, which took a little over a year. "We thought it would [only] take a few months to put out," Brownstein said, adding that it was his first time developing a mobile application.

If you download iDrunky, let us know what you think — and how well you did on the tests.