Certain embodiments involve a system comprising at least one processor; and a memory storing instructions which when executed by the at least one processor cause the at least one processor to: cause a first symbol array to be selected and displayed on at least one display in a display area, the first symbol array including a plurality of selected symbols from each reel of a plurality of reels at respective symbol locations of the display area; add at least one first Wild symbol to the display; cause a second symbol array to be selected and displayed on the at least one display in the display area, the second symbol array including a plurality of selected symbols from each reel at the respective symbol locations of the display area; add at least one second Wild symbol to the display; and move the at least one first Wild symbol relative to the display area.