Vizati, the mind-bending rotational puzzler from Different Pixel, is free to download for a limited time.

The game has you using touchscreen gestures to rotate, flip, and shake a magical cube in order to connect coloured blocks.

These are the 'Vizati' you were wondering about, I imagine.

There are two modes on offer - Arcade and Story. While Arcade offers a pure puzzling experience without any distractions, Story mode introduces a narrative accompanied by some rather charming hand-drawn art.

With exactly 100 levels to test your brainbox, and Game Center support to compare your scores, Vizati gives you plenty of puzzling bang for your buck.

Or, for the time being, plenty of bang for no buck.

There's no word on when this offer will end, so puzzle fans are advised to hurry to the App Store to snap up this cerebral freebie.