The story
Fiction and adapted settings written by Akitsora Gaming for this title, including invented dialogue and events. This is not a historical or folklore reference. The rules and specification tables define the gameplay and math.
A gassho roof is a whole autumn's harvest of thatching grass, hundreds of binding ropes, and the day the village climbs up together.
I. Cutting the grass
On clear autumn days the grass is cut from the hillside and dried until every bundle turns straw-gold, then tied and stood beside the house.
The foreman says the grass must be bone-dry, or the roof will not last through a winter of snow.
II. Thatching
The worker on the roof takes each bundle and lays it course by course from the eaves upward, pinning and roping it to the frame.
The number on a falling snowball is the weight of the spin (base game ×2 to ×20).
III. Thatching before winter
Gather 4 thatching slips and course after course of straw sweeps across the screen as the first snow begins to fall. Over the next 15 spins the multiplier keeps growing (×2 to ×500).
3 more thatching slips add 5 more spins.
IV. Inspecting the roof
The last bundle is tied; the foreman steps back, shades his eyes against the autumn sun and takes in the whole roof — and the worker up top raises a bundle in reply. This house is ready for the snow.