The Rubik's cube reinvented for smartphones. By rotating and shifting the circles one needs to match all colours to the background hexagonal pattern. - The app intro shows the equivalence to the 2x2x2 Rubik's cube. The moving circles represent the corner elements of the Rubik's cube. - The tutorial shows the target pattern and the motions of the moving circle. - There are three game levels: in beginner there are only two colours in the puzzle, in the intermediate four circles are completely transparent, while the professional gives the complete Rubik's cube experience. - The app offers a 3D Rubik's cube view of the puzzle state, in order to teach the equivalence - Rotate the circles by vertical moves and shift them by horizontal moves