NumNum

Gameplay and controls are executed entirely through a point-and-click interface using a mouse or touch input. The player interacts with NumNums by selecting them. A single left-click on a NumNum selects it, highlighting its border. Once selected, the player can click on an adjacent empty grid cell to move the NumNum one space. To combine two NumNums, the player selects one NumNum, then clicks on an adjacent NumNum of a different value. This action adds the two values together, replacing the clicked NumNum with a new NumNum whose value is the sum. If the sum exceeds 9, the NumNum splits into two: one NumNum with the value of the tens digit (if any) and one with the value of the units digit. For example, combining a 7 and a 5 produces a 1 and a 2. To split a NumNum, the player selects it and then clicks on an empty adjacent cell. This action divides the NumNum's value by two, rounding down. The original NumNum is replaced by two NumNums: one with the quotient and one with the remainder. For example, splitting a 7 produces a 3 and a 4. The game provides an undo button (keyboard shortcut Z) that reverses the last action. A reset button (keyboard shortcut R) restarts the current puzzle from its initial state. The player advances to the next puzzle only upon achieving the specific target condition displayed at the top of the screen, which may be a single target number or a specific arrangement of multiple NumNums.