It's time to spread a color infection with Color Infection 2. The objective is to make all the yellow balls turn brown. You achieve this by getting the brown balls to smack in to the yellow ones. There is a trick though, because you are not allowed to infect the green balls, which are spread throughout the game in places that make it more difficult for you. If it wasn't difficult, it wouldn't really be much of a puzzle, now would it? Go ahead and see how well you can spread the infection.