Monkey Go Happy Marathon is the fifth installment of point-and-click mini-game series from Pencilkids. Choose a monkey and complete a series of challenges to turn the monkey's frown upside down. Every stage can be completed with just your mouse, either by clicking on or dragging objects in the scene. Each stage has a countdown timer, which represents your score. The quicker you complete a stage, the more points will you receive. There are also bonus stages, which will allow you to improve your score.