2D Boy's insanely popular puzzler goos over yet another operating system. This time World of Goo is available on the Android Market with a celebratory 40% off discount ($2.99) until December 5. For those go-getters who love achievements, World of Goo has been integrated with OpenFeint.

The developers blog that the game will run on most phones with Android 2.2 or newer and on all tablets. "There are lots of Android devices out there with varying capabilities, so if you have an older phone, we recommend trying the demo first," they suggest.

The free demo to test drive World of Goo's compatibility on your Android device is available here. The full version is available here.