15 rooms on a side
Fifteen rooms on a side. Still one unique route between any two rooms.
Halfway between Medium and Hard in footprint. Classic stays readable on a tablet. On a phone, Fit view keeps the gate in frame; zoom in when a fork is tight.
The number is rooms, not pixels. Walls sit between rooms, so the drawing is 31 tiles across. Start is top-left; exit is bottom-right. Same seed, size, and mode rebuild the same corridors.
How to walk it
Arrows and swipe take a whole corridor and stop at the next fork. Yellow marks where you moved — not a solved path. Hint draws one solid arrow; Peek flashes the shortest route. Either leaves that run off local Marks.
Also: all room counts, make desk, print this size, right-hand rule.