FEZ is a puzzle-platformer built around a single trick: Gomez, a small creature who believes he lives in a flat 2D world, gains a red fez that lets him rotate the whole world in 90-degree turns to reveal it is really a 3D space seen from four sides. Play consists of jumping between ledges and rotating perspective to line up platforms, ladders and paths that were disconnected a moment before, all to collect scattered cubes and cube fragments and restore order to the universe. There are no enemies, no bosses, and no penalty for falling — Gomez simply respawns. The world is warm and pixel-art styled, filled with forests, factories, a lighthouse, a city and a library, and much of the game is optional secret-hunting: hidden rooms, treasure maps, a cipher alphabet and codes to decode. It is a calm, exploration-and-discovery game with no combat or mature content.
The game frames itself as a gentle 'stop and smell the flowers' experience about curiosity, discovery and quietly making sense of a mysterious world; its tone is wonder and problem-solving, with no conflict, threat or moral peril presented to the player.