Here's how to play Blackbox, the fun-yet-infuriating iPhone puzzle game that's rising to the top of the App Store

Others, like Blackbox, require so much wit and creativity that you'll either end up feeling frustrated or incredibly proud of yourself.

Blackbox is a puzzle game for iPhone that's rapidly climbing the App Store's top free apps chart - and for good reason.

The app gives you small challenges that you have to complete by doing everything except touch the screen. Each challenge ends when you "turn on the lights," meaning the small, brightly-colored squares (called lights) change from empty to filled. To do this, you have to use your phone's other sensors, features and functions to trigger the puzzle.

If that sounds confusing, it is, and Blackbox is hard - I mean really hard - but equally rewarding. Here's how it works.