Is a classic puzzle where you have to move some disks placed on a tower in order to take them to another tower, following just two simple rules: No disk may be placed on top of a smaller disk and each move consists of taking the upper disk from one of the rods and sliding it onto another rod, on top of the other disks that may already be present on that rod.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.