Push the crate. Let the water do the rest.
Push, never pull
Classic Sokoban rules: one crate, one square at a time, and you can never pull. Every port is a small wooden pier where every push matters.
Crates float
Push a crate off the pier and it floats. Slow water carries it one square every move, rapids sweep it away at once, still water holds it where it landed.
Dock at the buoys
Some deliveries are made on the water. Steer a floating crate onto a buoy and it is tied down for good. Spare crates can be sacrificed as stepping stones.
Ride the current
Step onto a floating crate and drift with it. Later ports add ice that slides, barrels that roll until something stops them, and tide gates that open and close the channels.
500 levels, 20 ports
From Fishing Village to Grand Harbor. Every level is built and verified by a solver: there is always a way through, the water always matters, and a greedy push never works.
Undo, hints, Game Center
Take back any move for free. Stuck? A hint shows the next move. Sign in to Game Center and your progress follows you to a new phone. Works offline.
Twenty ports, one new trick each
Each port introduces one idea and then mixes it with everything before it: still water, currents, rapids, ice, barrels, two and three crate colours, river crossings and tide gates, all the way to five-crate puzzles in Grand Harbor.