One Rule

One Rule is a Sokoban-style push-box puzzle built on a single rule: push a box into an empty tile — never through a wall, and never through another box. 15 hand-crafted levels across 3 escalating tiers (1, 2, and 3 boxes per room) teach and then test that one rule until it clicks. Every level ships with a solver-verified par move count, so you always know exactly how close to optimal your solution was. KEY FEATURES One Rule, Fully Explored No combat, no story detours — every level exists to deepen the same core mechanic. Solve it with fewer moves than par for a true mastery run. Move Counter, Par, and Undo Track your moves against each level's optimal solution, undo a misstep instead of restarting, and reset any level instantly. Daily Challenge A new deterministic puzzle every day, separate from the 15-level campaign. Level Editor and Share Codes Build your own levels, test them for solvability before sharing, and trade them with friends using compact paste-in codes — no account or internet connection needed. Personal Stats Dashboard Track your per-level history, streaks, and moves-over-par trends, and watch a replay of your best run on any level — all stored on your device. Built for Everyone A colorblind-safe palette, rebindable keys, and full gamepad support. No Ads. No Accounts. No Data Collected. One Rule doesn't show ads, doesn't require sign-in, doesn't connect to the internet, and doesn't collect or share any of your data. Everything — your progress, stats, and custom levels — stays on your device. If you like Baba Is You, The Witness, or classic Sokoban, One Rule gives you a small, focused puzzle box built around exactly one honest rule.