2D Boy has announced on its blog that its beautifully constructed physics-puzzler World of Goo is on sale until Sunday, meaning you can pick up both the Universal HD version and the iPhone-only edition for a paltry 69p / 99c each right now.

On top of its cracking tower-building gameplay, superb sound, and excellent visual design, World of Goo boasts an unmistakable charm that will you draw you back into its sticky world over and over again.

No wonder, then, that we awarded it a highly coveted Pocket Gamer Gold Award when we reviewed it on iPad.

World of Goo and World of Goo HD are available to download from the App Store for 69p / 99c until the end of Sunday.