This game is now available for Android (starting Android 4.1 or newer). It is the puzzle for people who like to use much logical thinking skill to solve the puzzles. The aim is to move all rings to the required targets (circles) of matching colours. Only rings can move but move is possible only if there are at least two movable rings of chosen type (colours). You just select single ring and you move to adjacent cell which has no another ring, then all movable rings of same colour will move to its adjacent cell. You cannot make diagonal move.
It is downloadable here: