Note: Coral Sea runs entirely in your browser — no download, no installation and no account needed. Progress is stored in the browser on this device. The in-game interface is available in English and Simplified Chinese.

Game Introduction

Coral Sea is a single-player, ocean-themed mahjong solitaire. Pearl-white porcelain tiles are stacked into layered boards, and your only job is to pair up two identical sea creatures and clear them away. It is not table mahjong for several players and it is not a card game: it is a layered matching puzzle where the only real decision is which tiles have become free on top.

Beneath the stack lies an illustration. Every pair you remove reveals a little more of it, so the level itself slowly uncovers the picture until the board is empty and the full scene is on show.

Platforms and Device Requirements

Browser: any current version of Chrome, Edge, Safari or Firefox. Nothing has to be installed.
Controls: mouse or touch. Tap a tile to select it, then tap the second tile of the pair.
Devices: works on desktop computers and on mobile phones, in portrait and in landscape orientation.
Language: the in-game interface is available in English and Simplified Chinese.

Basic Gameplay Guide

Which tiles you can pick

A tile can only be selected if no tile is resting on top of it and, in addition, either its left side or its right side is clear. One open side is enough — the column next to it may still be occupied. If a tile has another tile sitting on it, the covering tile has to go first.

How a pair is formed

Both tiles of a pair must show the same creature, and both must satisfy the rule above. They do not have to be neighbours: you can match a crab in one corner with a crab at the far end of the board. That is why the game is not about tracing a path — it is about stripping the top layers away so the ones underneath become available.

When the board is completely empty, the level is solved and the next one unlocks.

Hints, undo and shuffle

None of the helpers are locked behind progress. Hint highlights a pair that can actually be removed, undo puts back the last pair you cleared, and shuffle rearranges the tiles still left on the board. You can also restart the current level at any time. The settings menu lets you jump to any level you have already unlocked, switch the game language, and turn the sound on or off.

Levels and Patterns

Coral Sea has 20 levels, and the board grows wider and deeper as you go: the last levels reach 6 layers and 144 tiles.

The tiles carry eight ocean patterns: shells, sea stars, sea turtles, jellyfish, tropical fish, seahorses, crabs and pearls. They are original vector drawings rendered on pearl-white porcelain, set in a deep-sea blue palette with gentle floating decoration, and every level carries its own sea name and its own short text.

The picture waiting under the tiles is an original coral reef illustration. All twenty levels currently share that one ocean background, so the reward is the same artwork every time — what changes from level to level is the layout you have to work through.

How it relates to Orchard

If you have already played the fruit version, Orchard, you know this game: the pairing rules and the twenty board layouts are exactly the same. What Coral Sea changes is the art direction — ocean patterns instead of fruit, a blue palette instead of green, and a coral reef illustration instead of a photograph. The two games also keep separate progress: unlocking levels in Coral Sea does not affect Orchard, and the other way round.

Coral Sea is the current name of the game that used to be called Moonlit Orchard. Older links and existing saves still work.

Advanced Tips

Read the top layer first

Before touching anything, look at the tiles in the uppermost layer — they are the only ones that can be paired. A board that looks completely stuck often still has four available matches in the top layer.

Clear whatever covers other tiles

When two tiles can both be removed and one of them is sitting on top of several others, take the upper one first. Every removal in the top layer typically opens three or four new possibilities underneath.

Keep the shuffle for a rescue

Shuffling helps when you are out of moves, but it changes the positions and can make patterns that were easy to spot harder to find. Treat it as a rescue option rather than a routine step.

There is no timer

Coral Sea has no countdown. You can put a level down halfway and come back to it later with nothing lost.

Common Questions

The game does not load?

Click the cover image above to start the game. The first load pulls the game files, so give it a second or two on a slow connection. If nothing happens, reload the page and try again.

Is my progress saved?

Only the levels you have unlocked are saved. The board itself is not: reloading the page or closing the tab restarts that level from the beginning. The save lives in this browser on this device only, with no cloud backup and no syncing between devices.

What if I run out of moves?

The starting layout is generated along a solvable order, so there is always a way through. Even so, if you make the wrong choices, there can be moments when no pair is left at all. Use shuffle to rearrange the remaining tiles and carry on.

Is it multiplayer mahjong?

No. Coral Sea is a solo puzzle for one player, with no online opponents, no leaderboards, no shop and no daily tasks — and no timer either.

Conclusion

Coral Sea is a calm mahjong solitaire with a cool blue palette and an original coral reef illustration waiting under the tiles. The rules are the familiar ones, so read the top layer, remember that a pair never has to be adjacent, and reach for the shuffle whenever the board locks up. Twenty levels, eight sea creatures, and not a single countdown.