Moonlights is described as 'tower building physics puzzler, that will challenge the brain and the physics skills of the whole family'. There are seven games similar to Moonlights for a variety of platforms, including Windows, iPhone, Android, Android Tablet and iPad. The best alternative is World of Goo. It's not free, so if you're looking for a free alternative, you could try Huje Tower or Tower of Goo. Other Moonlights like games are Eufloria (Paid), Prune (Paid), Tiki Towers (Paid) and Marble It Up! (Paid).
From the developers that brought you the Marble Blast series comes Marble It Up! - the joyful, bouncing, beautiful game you’ve been waiting for. Roll, jump, and master the custom-built marble physics to make your way through dozens of breathtaking levels!