Android Giveaway of the Day - IQ sphere

This is a polyhedron, faces of which can be black or white. You can rotate it and tap on faces. When you tap the face, it changes color to opposite one, also all the faces, which is connected to it, changes it's color. The goal of the game is to make all the faces the same color. This is AD-free version. There is also a skin hinting how to solve the puzzle.