Follow Letter Trails on a Subway Map

Product Description

Core Gameplay
The playing field is a stylised subway map, where stations are labelled with letters. Players must plan a route that visits stations in alphabetical order (A → B → C …) using only existing train lines (coloured paths). The train cannot teleport – it must follow continuous tracks. Reaching Z without getting stuck completes the level.

Level & Content Design
45 subway maps, each based on a simplified topology of real European city metro systems (but with fictional station names). Number of stations ranges from 12 (small map) to 40 (large interchange). Difficulty arises from missing direct connections – players may need to backtrack or transfer lines. Fixed set, no live updates.

Visuals & Experience
Clean, schematic style with bold line colours (Tube map aesthetic). The active train leaves a moving dot trail. Tap‑to‑move or drag‑to‑draw both supported. A small overview map shows the whole network. Animations are quick and functional, not flashy.

Key Features

“Next station hint” highlights the nearest unvisited letter reachable by a valid path.

Unlimited undo of the last three moves.

Zoom and pan with two‑finger gestures.

Offline play after purchase.

User Value
Develops route‑planning and map‑reading skills in a low‑pressure puzzle context. Ideal for adults who enjoy logic puzzles and urban transport enthusiasts.

Usage Scenarios
During a real commute (virtually playing on a metro), a waiting time at a station, or a quiet evening puzzle session at home.