Players control Momo, a sorcerer cat. She goes to a magic school and defeats a ghost that steals her spellbook. Momo fights ghosts and bosses throughout five levels, taking place in the school's library, a cafeteria, a classroom, a gymnasium, and on the rooftop. Ghosts are defeated by clicking and swiping the mouse in certain directions, pertaining to the symbol atop the ghosts' heads. The swiping directions include an horizontal line, a vertical line, a "v" shape, a "ʌ" shape, and a lightning bolt, the latter-most of which summons lightning that destroys onscreen enemies. On occasion, the player will be allowed to swipe in a heart-like shape to regain health.