Tideline: Sandcastle Puzzle
A calm rhythm game by the sea
Only for iPhone
$2.99
iPhone
Build sandcastles and let the sea take them. 150 puzzle levels to three-star, a postcard album to fill, a Daily Challenge, and no lives, ads, or in-app purchases.
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.
A Closer Look
The developer, Green Bomber Gaming, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Green Bomber Gaming LLC
- Size
- 29.2 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Infrequent
Contests
- Copyright
- © 2026 Green Bomber Gaming LLC
