Sai no Kawara

Sai no Kawara is an idle game inspired by Japanese folklore: stack stones, let the demons destroy them, and turn every collapse into progress — the folk image of children piling stones on the riverbed while demons knock them down again and again becomes the game's growth loop. The higher you stack and the harder it falls, the faster you advance. It is free, needs no download, and starts your stone-stacking straight in your browser.

Simulation