"Clean Building" require players to play as a building cleaner to wipe away stains on windows.Use the arrow keys to control the movement of the game character, and stay in front of the stained window to erase the stain.Pay attention to the prompts before the window opens. If you do not avoid it in time, the window will cause the game to fail.In "Hard" mode, you will clean a larger building, and residents will open windows more frequently.
Come and try it!