Rubik’s cube
The Rubik's Cube is a 3D mechanical intellectual puzzle . This is a classic Rubik's Cube, each of the six faces is covered by nine stickers, among six solid colors (white, red, blue, orange, green, and yellow). A pivot mechanism enables each face to turn independently, thus mixing up the colors. For the puzzle to be solved, players are supposed to touch the screen to ensure that each face must be a solid color.
With one finger one can touch to swirl the one raw of solid colors, while with two fingers one can touch to change the view angles so he can have an overall sight of all faces of the cube.