Monkey go happy, No one likes to see a sad monkey! Luckily you can cheer him up. You've just got to figure out how. Another crazy Monkey Go Happy adventure game! This time you are in a farm, a gas station, a street or in many other crazy places that need your help! You can. Play Monkey Go Happy Mayhem for free on CrazyGames. It is one of our best Puzzle games!.