Tideline: Sandcastle Puzzle

Build sandcastles. Let the sea take them.

Tideline is a calm, rhythmic block puzzle about building something beautiful and letting it go. Your castles only pay when the sea carries them away.

HOW IT PLAYS Three molds fill with sand on their own: squares, triangles, and wedges. Drop the pieces onto the beach and turn them to fit. When the sand matches one of your three castle cards, the card lights up. Tap it to set the castle.

Waves roll in on the beat of the music. 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.

Use your pieces in time. A full mold left too long burns into stone, and stone never washes away. If the stone takes the beach, your run is over.

FOUR WAYS TO PLAY Puzzle: 150 levels, 50 on each beach, each with its own goal, from letting the sea take a specific castle to reaching a target score in time. Some start with stone already on the beach or a storm rolling in. Finish the goal for one star, beat the clock for two, and play tidy for three. Levels unlock as you go. One Day: a full day on the coast of your choice. When the song ends, one last wave sweeps the beach and takes every castle it reaches. Daily Challenge: everyone gets the same beach each day. Replay it as often as you like and chase your best score. Endless: day after day, coast after coast, as the sea rises and the storms grow.

POSTCARDS The first time the sea takes each castle, its postcard fills in your album. Every coast has its own page to complete.

THREE COASTS The Gulf: the forgiving one, with wide sand and the slowest song. The Atlantic: golden sand, a windswept pine, and a steady pulse. The Black Sand Coast: the hard one, with bigger waves, a higher tide, and the fastest song.

Each coast has its own song, and the song is the day. The music and the light change from dawn to night, and storms can roll in.

NO LIVES. NO ADS. NO IN-APP PURCHASES. Pay once and everything is yours. No energy to wait on, no continues to buy. Just you, your sandcastles, and the sea.

Made by Green Bomber Gaming, a one-person studio.