Color Zen isn’t the most complicated game, or the most challenging — but it certainly has the potential to be addictive. This graphically brilliant game presents players with colorful patterns and a straightforward objective: Get the whole screen to be the same color as the border of the level. The puzzles start off pretty easy but grow harder as players have to negotiate layers of colors to land on just the right finishing move. With soothing sound effects (which can be turned off) and devilishly simple gameplay, Color Zen is a pretty good candidate to be your next favorite puzzle game. And, as an added illustration of thoughtful design, the app is touted as colorblind friendly. Free for Android devices, 99 cents for iOS devices.