How Plumb levels are made: a generator, a solver, no repeats
Behind the scenes: how Plumb's levels are generated, proven solvable, checked so no two are alike, and ordered so the game never gets easier.
Behind the scenes
Made by two: a human and an AI building a puzzle game
Plumb is made by a two-person team: Shravan Goswami and Claude Opus 5.5, an AI model. How the work is split, and what it is like.
Why four directions go so deep: the maths of tilting
Plumb has only four moves, yet late levels take a dozen tilts to solve. How one swipe moving every marble creates a huge space of positions.