80 BPM
The Gulf
The forgiving one. The widest stretch of dry sand and the slowest song of the three.
Build sandcastles. Let the sea take them.
Coming to mobileRhythm block puzzleNo adsIn development
HOW IT PLAYS
Ride the rhythm of the tide.
Tideline is a block puzzle on a living beach with one twist: your castles only pay when the sea takes them. Waves roll in on the beat of the music, the tide climbs through the day, and the beach keeps getting smaller.
Drop the pieces
Three molds fill with sand on their own: squares, triangles, and wedges. Drag each piece onto the beach and turn it to fit.
Match a card
Your three castle cards light up when the sand on the beach matches their shape. Tap a lit card to set that castle.
Let the sea take it
When a wave big enough reaches a set castle, it crumbles into the surf and pays the card's points. Bigger castles pay more, but only bigger waves can take them.
Mind the stone
A full mold you don't use in time burns into stone, and stone never washes away. If it takes the beach, your run is over.
PUZZLE MODE
Three stars to earn.
150 puzzle levels, 50 on every beach, each with a goal: let the sea take a Blockhouse, score 90 points, or let the sea take three castles, all before time runs out. Some start with stone already on the beach. Some start with a storm.
Finish the goal for one star, beat the clock for two, and play tidy for three. All three beaches are open from the start. Finish a level to unlock the next, and replay any level as often as you like for more stars.
POSTCARDS
Every castle earns a postcard.
The first time the sea takes each castle, its postcard fills in your album: a keepsake of what you built, stamped with the coast and the time of day.
Every coast has its own page to complete, from the gentle Gulf to the Black Sand Coast. Fill every page to complete the collection.
THREE COASTS
Each shore has its own rhythm.
Every coast has its own song, and the song is the day: the music and the light change from dawn to night. Storms can roll in too. Tap Listen on any coast to hear a piece of its song.
93 BPM
The Atlantic
The classic. Golden sand, a windswept pine, and a steady pulse.
105 BPM
Black Sand Coast
The hard one. Bigger waves, a higher tide, and the fastest song in the game.
An original summer synthwave soundtrack, made to get lost in.
FOUR WAYS TO PLAY
Pick your kind of beach day.
Puzzles
150 levels, 50 on every beach, each with its own goal and three stars to earn. Finish one to unlock the next.
One Day
A full day on the coast of your choice, from dawn to night. When the song ends, one last wave sweeps the beach and takes every castle it reaches.
Daily Challenge
Everyone in the world gets the same beach each day: the same coast, the same cards, the same sea. Replay it as often as you like and chase your best score of the day.
Endless
Day after day, coast after coast. The sea sits higher and the storms hit harder each day. Keep going until the stone takes the beach.
IN MOTION
Straight from the game.
No lives. No ads. No in-app purchases.
Pay once and everything is yours. No energy to wait on, no continues to buy, nothing locked.
Catch the first wave.
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You're on the list.We'll tell you when the tide comes in.
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