Harbor logic puzzle
The puzzle where the water moves.
Every board starts as a tangle. Then the tide turns. Which line can leave first, and can it leave right now? Try this board and find out.
Download on the App StoreTap an arrow with a clear run. Sand stops arrows at low tide, and the tide turns every 3 arrows.
Most puzzles ask what's free. Castoff also asks when. The same arrow can be stuck one moment and clear the next.
Sandbars rise out of the water and stop any arrow that reaches them. A bump costs a heart.
The sand slips under the water and the way is open. The tide turns every time 3 arrows leave, so your order decides what opens next.
Waiting turns the tide for the price of a flag, never a heart, so you can always finish. Find the right order and you never need to.
Each new piece arrives with its own rule, and the game explains it the first time you meet it.
Launches up to three more free arrows.
Holds the way until enough arrows have left.
Needs all three lanes clear.
Swallows any arrow that reaches it.
Bends an arrow's path, and its walls stop it.
Sends an arrow out of its twin, same heading.
Every 5th level, from level 10
Rough levels give you two hearts instead of three. Plan before you tap, because you get one mistake.
Every day, from level 6
A new picture puzzle waits each day. Complete it to add to your chart count.
Castoff uses Google Analytics for Firebase to count how the game is played, such as which screens are opened, levels started and finished, hints used and purchases made. This helps us balance levels and fix problems. These events are tied to a random app instance ID, not to your name, email or advertising identifier, and Castoff does not track you across other companies' apps or websites.
Your progress and settings stay on your device. The game has no ads and no account. Purchases are handled by Apple.
Last updated 2 November 2026