When the guy who created Tetris releases a new game, we can't help but take notice. And when tetromino godfather Alexey Pajitnov releases his latest iOS effort Dwice later this week, you'll might want to take notice too.

Dwice is a shape-matching puzzler which marries the decending object mechanic seen in Tetris with the colour-matching mechanic seen in every other iOS game released in the past 3 years.

The aim is to clear the screen by dragging triangles, circles, and squares through the geometric equivilants, thereby clearing the screen. To score big, you have to chaintogether as many objects as possible in a single swipe.

It sounds pretty simple, but you soon learn that if you accidently drag a circle through a square, you'll soon find yourself staring at the Start screen again.

Dwice has been developed by Pajitnov in collaboration with WildSnake Software. It actually shares its name with a game the team developed for Windows back in 2006, though that version featured descending tetrominos instead of shapes.

You'll be able to download Dwice for £1.49 / $1.99 this Thursday, when it goes live on the App Store.