Joker Jewels

Work paddles and mitre gates in the right order before a boat may pass. Joker Jewels is an offline lock-flight studio for canal-curious travelers, STEM clubs, armchair narrowboaters, and museum waterway galleries. This is schematic lock-chamber play—not a cruise diary, live map, miniature diorama, or craft sandbox. Discrete gate, paddle, and water-level controls, seeded waybills, and a water-conservation score are the whole game. Forty seeded flights Start at a single rural lock or climb a five-lock staircase. Each puzzle carries a waybill cargo goal and a star rating for water conserved. Empty a full pound for no reason and the score drops. Undo and reset are always at hand; there are no decoration tools and no freeform canvas. Schematic lock-chamber play Tap ground paddles, gate paddles, and mitre-gate pairs in sequence. A water-level gauge and sill marker update as the chamber fills or empties, so order of operations is visible, not hidden. How a lock works Illustrated lessons cover filling, emptying, gate balance beams, sills, and why bow fenders matter. Gear-identification quizzes cover windlass, paddle gear, mitre gates, pound, flight, and guillotine lock types, with an explainer on every answer. Open the glossary any time. Canal Map, daily flight, and widget Choose a lock by number and difficulty, then continue-cruise resume so you never land on an empty list. A daily flight recaps move count, wasted locks, and the correct paddle order. A home-screen widget shows the daily flight name, your best water score, and a mini water-level bar. Fully offline The catalog is stored on device. Set animation speed, left-hand windlass, color-blind gate patterns, and haptics, then play from Home Wharf to Lock Play without a connection.