Beleaguered Castle is a difficult patience game whose aim is to build up in suit on the four foundations (from ace to king). Cards can be moved on the stacks surrounding the foundations singly, and stacked in descending sequence regardless of suit.
Drag cards with the mouse.
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.