Game: Flux

Flux is the kind of puzzle game you can play during a quick coffee break, or sit down for a marathon session. It's simple to learn and easy to play, but getting to the point of mastery means learning to think ten steps ahead. This works in Flux's favor, however, as the game doesn't bother with power-ups or mini-games to distract you from the puzzles at hand.The overall goal of Flux is to create an uninterrupted flow from the source tile (purple and marked with an arrow) to the sink tile (purple and marked with a circle). To accomplish this, all you need to do is swipe green tiles to change the direction they're pointing, 90 degrees at a time. Tiles that enter the flow turn from orange to green, while immovable tiles stay blue, and tiles outside of the flow orange. You can only change green tiles and the source tile, which limits how many moves ahead you can work. It's essentially a simplified version of Pipe Mania, but all you have to worry about is which direction each tile is pointing."Flux comes with ten level packs that are unlocked successively by collecting a certain number of stars. Getting a perfect star score is an exercise in extreme precision, as you quickly lose stars by using more moves than the level allows. After you play through the initial ten packs you'll find yourself staring at an additional 375 puzzles waiting to be unleashed. Even with a perfect score on the previous stages you'll need to dip into Flux's in-app purchase system to nab extra stars. You can also get ten stars for free by sharing the game on Facebook, which isn't too bad.