Attention · 600 levels in the app
The same stacking puzzle told through kamon: the family crests that identified Japanese clans on armour and banners. Crests were designed to stay readable as small monochrome badges, which is exactly what this game asks of your eyes.
Tap a lacquer stand to lift its top crest, then tap another stand to place it. A crest only lands on an empty stand or on an identical crest. Easy and medium give each crest its own colour; hard renders all eight in the same gold.
Gather every crest of a kind onto one stand. Hard mode runs the stands seven deep with all eight crests, drops the colour, and conceals every crest you have not uncovered: shape recall, not shape recognition.