Color Zen from Large Animal Games is a relaxing puzzle game that's probably going to be your next go-to for quick bursts of entertainment. Each level hands you shapes of various colors, some of which are movable, all you have to do is give them a quick swipe. When shapes of the same color collide they meld into each other and fill the entire screen, effectively eliminating that color from the puzzle. The goal is to get every visible object the same color as the border.
Color Zen becomes challenging when it starts playing with shapes nested inside of other shapes. If you want to get rid of all blue things, you have to make sure every blue object can be "touched" when you slam two blue shapes together. It's a bit like Factory Balls in that order is king. Think a few moves ahead and you'll do fine. There's no scoring and no timer, making this a great puzzler to sit back and relax with. Simple idea, great game.
NOTE: This game was played and reviewed on the iPad 3. Game was available in the North American market at the time of publication, but may not be available in other territories. Please see individual app market pages for purchasing info.