Highlights
The hinge is the key
Open and close to join bridges and bend beams of light. iPhone Duo uses the system hinge; every other iPhone plays with the on-screen fold slider.
5 chapters, 30 levels
Forest, mirror city, fault islands, gravity reliquary, time-sand temple. Each chapter ends in a boss and hides memory shards.
Four companions
Lantern Fox, Mirror Crow, Wind Ray and Time-Sand Deer — combine their abilities to solve each mechanism.
First six levels free
Unlock the rest with a single one-time purchase. No ads, no account.
UNFOLD is a puzzle game designed around the fold angle as an input device. Every level is described in JSON and evaluated deterministically by the Fold Engine — a pure Swift package with no UIKit dependency — while SpriteKit scenes and RealityKit cinematics run on top of it.
The opening art and every chapter’s illustrations were drawn for this game; the chapter music is generated on the device.