How to play

Join the water from the spring to the sea. When it runs all the way, a boat sails your river and the painted country wakes as it passes.

Moving tiles

• Click a tile to turn it a quarter turn. Right-click turns it back. On a touch screen, press and hold instead of right-clicking.
• Drag a tile onto another to swap the two.
• Framed tiles (the spring, the sea and the locks) are set in mortar and never move.

The river

• The river must pass through every lock, straight through, the way the lock lies.
• A bridge carries the river over itself, so it can cross its own path.
• Click a whirlpool to carry the eight tiles around it one place round. Those eight tiles cannot be dragged, but they still turn.
• A tile marked with a sun or a moon has a different picture on its back. Right-click it (or press and hold) to flip it over.

Moves and par

• Every turn, swap, flip and whirl is one move. Par is the fewest moves that wall can be finished in.
• Finish in par for a PERFECT!! Undo takes a move back; restart sets the count to zero.

Keys

Z undo · H hint · R restart · N next wall · P previous wall · 1–9 and 0 jump to a wall · F or Space acts on the tile under the pointer