Memory Manor is set in a mysterious manor where Wee Willie, a window washer, must keep his customers happy while managing his limited water supply. The manor's residents are initially welcoming but soon become worrisome about Willie's work, making it essential for him to remember who lives where and who wants their windows washed. With the rain adding to the challenge, Willie must make quick decisions to avoid wasting water on unwanted customers.
Players take control of Wee Willie as he navigates the manor, moving left and right, climbing ladders, and washing windows in front of him. The game relies heavily on memory, as the windows fog up after a brief glimpse of the occupants, hiding their presence. Willie's goal is to wash the windows of happy customers while avoiding those who don't want their windows washed, all within his limited water supply. If he runs out of water, the game ends.