Flagline

Flagline is an offline single-player semaphore dispatch puzzle set in a fogbound harbor. You operate a signal tower by dragging the glowing grip on each blue or red flag arm. Match the arm to its translucent target shadow and one of eight clear notches around the dial. When a complete pose is correct, the signal travels across the real tower chain, through the visible fog lanes, and toward the marked ship. Ship lamps, wakes, route lines, and the reef edge show exactly what the action changed. The opening watch introduces the blue and red arms one at a time, so the first useful action can be discovered in the scene without studying a full semaphore chart. The launch release contains exactly eight handcrafted watches: Near Cutter, Mail Sloop, Outer Ferry, Fog Convoy, Hospital Ship, Cargo Lanes, Rescue Dispatch, and Reef Evacuation. Difficulty grows from one guided arm to ordered two-arm poses and relay-tower switching, then adds timed visibility windows, a windward brace, split cargo channels, vessel priority, and permanently closing tide routes. These are not repeated levels created by changing a ship model, flag color, speed value, or fog tint. Each watch changes its route structure, stage rules, hazards, required decisions, or action order. Consecutive correct poses build a Signal Chain. Flag snapping, relay propagation, lamp acknowledgements, ship turns, berth lights, milestone beacons, and the final harbor celebration provide visible and audible feedback. Pennants support tactical Relay Kit choices during the current watch. Harbor Crests, opened berths, 32 collectible ship cards, Clear Signal mastery, safe-distance records, and the best signal chain remain visible in Harbor Watch and Ship Log after the session. A failed signal identifies the wrong notch, broken relay, blocked sight line, or stopping point before the reef instead of replacing the result with a generic message. Reduced Motion keeps equivalent outlines, lights, labels, and final states. Rewarded advertising is optional. It can restore an unfinished ship, redraw Relay Kit choices, or double report Pennants only after a validated success callback. An advertisement never positions a flag, selects a tower route, sends a ship into harbor, awards a Harbor Crest, or changes Clear Signal mastery. Low-frequency interstitials are attempted only on specified returns to the harbor and remain protected by cooldown, timeout, and a visible waiting state. Flagline combines precise two-dimensional arm control with three-dimensional distance, fog, sight lines, vessels, and reef depth. It does not promise free sailing, an infinite fleet, online harbor management, or offline high-end rendering beyond the real Godot mobile presentation shown in these store images.