You and the computer take turns moving cells on the board. Move a cell by clicking/tapping the origin and destination, or by dragging. When the board is full, the player with the most cells wins.
Cells may be split (duplicated) by moving to any adjacent empty space. Cells may jump to any empty space 2 spaces away, including diagonally. After moving, a cell infects any adjacent opponent's cells by changing the cell's color.