Paper Tank

A shallow box, folded from paper and filled with water, exactly the size of your phone. Inside it, ten thousand small paper fish drift in a real current — they settle, gather, part and swirl the way things do in water — and a paper shark cruises among them. There is nothing to win. Drag a finger and the water follows it, sweeping the papers along and sending ripples across the surface. Tilt the phone and you look into the box: the walls, the floor and the papers shift with real depth. Leave it on the desk and it keeps going, quietly, on its own. PAPERS Four muted looks — Lagoon, Dusk, Sakura and Ink. The whole tank re-colours in a second. ANIMALS The reef shark is yours from the start. The hammerhead, with its wide folded head, and the whale shark, a spotted sheet folded broad and slow, are each a one-time unlock. Tap the shark to open the settings; it is the only button. MADE TO BE LEFT RUNNING No score, no timer, no notifications. Paper Tank collects no data.