Mobile games typically fall into one of two different categories. There are the Angry Birds of the world, games that are perfect for sneaking in some play while waiting in line or sitting on the bus. Then there are the games that demand your full attention, the kinds of experiences that tell you put on a pair of headphones before you play. And while Device 6 — the latest release from Year Walk developer Simogo — might not be a game in the strictest sense, it definitely demands all of your attention. It’s a short story mixed with a series of interactive puzzles, and it’s one of the most inventive and playful narrative experiences you’re likely to find.