◒ TWOFOLD HARBOUR
A SMALL PUZZLE ABOUT FINDING YOUR WAY

Two boats.
One tide.

One arrow moves both boats.
Let the shore help you bring them home.

THE FIRST CURRENT

01 First light

0 movesShortest 3
Blue boat → round dock Amber boat → diamond dock

Arrow keys / WASD · U undo · R restart · H hint
Or use the buttons. No clock. No rush.

A small game for your website

Play all 12 puzzles free. For commercial use, the proposed US$75 scope is a non-exclusive licence for one website and one branded build of these puzzles, with one agreed name and two-colour change. No new levels, exclusivity or ongoing maintenance.

Discuss your website use and the US$75 proposal ↗

Non-binding inquiry only; no orders or payments are accepted. GitHub sign-in is required and inquiries are public. Do not post private information. The game was generated with OpenAI Codex; no exclusive copyright guarantee is offered. Scope, acceptance, rights, timing and a feasible payment route must be agreed before any order.

TWOFOLD HARBOUR · EDITION 1

A small harbour,
a shared direction.

Use the shoreline to change the distance between two boats. Bring blue to the round dock and amber to the diamond dock. Every harbour can be solved; undo and hints are always free.

For website owners

This playable, 12-level HTML5 build is available for non-binding licensing evaluation. Proposed price: US$75 for a non-exclusive site licence and one branded build. One agreed name and two-colour change is included. No new levels, exclusivity, ownership transfer or ongoing maintenance is proposed. Final scope, acceptance, payment method, fees and eligibility require agreement before any order. There is no checkout here.

Open a public licence inquiry on GitHub with your intended use and price feedback. GitHub sign-in is required. Do not post private information; an inquiry is not an order.

Download the evaluation build (ZIP)

Creation & privacy

OpenAI Codex was used to design and generate the code, interface and puzzle layouts. The build has been checked with automated solution searches and browser tests; it has not been evaluated by independent human playtesters. No third-party artwork, fonts, music or game assets are included.

The game sends no gameplay analytics. It saves your best scores and last harbour in this browser only. The hosting provider may process ordinary access requests.

The public demo permits personal play and evaluation. A commercial licence is subject to agreement; no claim of exclusive copyright in AI-generated material is made.