# Lowtide Locks: Two worlds, one waterline.

A puzzle game for iPhone. **Coming to the App Store. Chapter 1 is free.**

Fifteen calm locks. Two to five minutes each. No way to lose.

A lock-keeper in a yellow oilskin works the brick sluices of a tidal estuary. The canal is still enough to be a mirror, and the world below the waterline is a second set of paths: sink through at a still stone and walk under the bridges to the bell.

## Three chapters, fifteen locks

Each chapter adds one mechanism. A lock takes two to five minutes, and each has a par: the fewest moves that open it.

- **Chapter 1 · free: The Shallows.** Tap to walk. Turn brass wheels until two paths meet where your eye says they do. At a still stone, level with the water, tap the keeper to sink below the waterline.
- **Chapter 2: The Locks.** Lifts rise and fall with the keeper aboard, bridges slide on rails, and mirror stones exist only below the waterline.
- **Chapter 3: The Sluices.** Raise or lower the tide. The mirror moves with it: stones go under, new joins appear below the waterline, and the way to the bell changes.

## What you get

One small game, made to be finished.

- **Chapter 1 free.** Five locks, no time limit, no sign-up.
- **One unlock, $3.99.** The Full Estuary opens chapters 2 and 3.
- **Free undo and restart.** There is no way to lose a lock.
- **Hints that are always right.** A solver on the phone shows the next step. You start with 3 and earn more; 10 more cost $0.99.
- **No ads, no tracking, no account.** Progress stays on your phone.
- **Plays offline.** Large, readable type throughout.

## Questions

- **Which devices?** iPhone with iOS 15 or later, in portrait.
- **Is the full game one purchase?** Yes. The Full Estuary is a one-time purchase and restores on a new phone with the same Apple account (Settings → Restore Purchases). Hint packs are optional.
- **Stuck on a lock?** Use Hint: a ring marks where to stand and a note names the move. Undo and Restart cost nothing.
- **Something wrong?** Write to us from the [support page](https://nguyenvanlamm.github.io/lowtide-locks-site/support.html.md).

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