Shell Swap: Hermit Crabs

🐚 What do real hermit crabs do when a new shell turns up? They line up! The biggest crab moves into the new shell and leaves its old one behind; the next, smaller crab takes that one... Scientists call this a "vacancy chain". In Shell Swap: Hermit Crabs, you start the chain! Drop an empty shell in the right spot, watch the crabs trade homes one by one and move every crab into a shell that fits. A cute, clever 3D puzzle game inspired by real science.

🔗 START THE SHELL CHAIN
• Drag an empty shell on the sand with your finger and drop it somewhere: nearby crabs rush over to see it.
• The crabs line up BY SIZE, biggest first. If the empty shell is better than its own, a crab moves in and leaves its old one behind; that freed shell passes to the next, smaller crab.
• While you drag, a glowing ring shows in advance which crabs will come.
• Tap while a chain is running to speed it up.

🦀 MAKE EVERYONE HAPPY
• A crab is happy in a shell of its own size or one size bigger; tight, loose or far too big shells make it unhappy.
• Make every crab happy before the tide comes in, which means before your moves run out.
• The fewer the moves, the more the stars: start a huge chain with one smart move and collect 3 stars!

🌊 8 SHORES, 120 LEVELS
• Calm Cove, Rocky Shore, Gull Beach, Octopus Cave, Coral Reef, Storm Beach, Litter Beach and Royal Lagoon.
• Rolling rocks open and block paths; gulls eye your empty shells; the octopus trades for a hidden shell.
• Ribboned picky crabs only move into shells of their own color; storm waves sweep away shells on the shore.
• Litter is no home for a crab: clean up the beach! At the very end, the giant Crab King joins the chain and everyone lines up.

🧪 CRAB WORKSHOP
• Long Tide, Shell Detector, Quick Sand, Pearl Diver, Sand Wall and Extra Move.
• The Shell Detector previews the result of a chain while you drag.
• Beach friends: the Crab Oracle, the Gull Guard dog, the Pelican and the Sea Turtle.
• Unlock a new crab color on every new shore; each one boosts your chain coins.

💡 WHEN YOU'RE STUCK
• The Hint shows the next correct move: which shell to drop where.
• If the tide comes in, "Continue" gives you a few more moves.

🎵 Calm beach music, sparkling water, cute crabs and sweet notes that climb with every shell swap.
📅 Daily Tide, daily rewards, quests, achievements and a lucky wheel.

Shell Swap: Hermit Crabs is free to play; it contains optional ads and in-app purchases. An internet connection is required to play.