Numberheads is a unique match-3 style game using numbers as playing pieces in a 49-piece, 7 by 7 grid. The player swaps two pieces by tapping or swiping the touchscreen. Pieces can be swapped in all eight directions, not just vertically and horizontally. The object is to create sequences of ascending or descending numbers, which are removed from the grid as new pieces drop down from the top of the screen. Familiar types of bonus pieces, including locks, keys, and area “bombs” keep the effort level casual and keep replay value high. Expert players can choose a harder difficulty level. More challenging than “standard” match-3 games, but easy to master. Innovative diagonal-move capability. Varying difficulty in each level enhances player engagement. Familiar special pieces allow instant player comprehension. Timed and “Zen” game variants.