• one screen shape: a cube on top, its pieces as tiles below, pale tiles for what could come next.
• the person's own box: always the same square, the same words, placed after the existing pieces. rows are always full.
• growth: the cube is the smallest n³ that holds the pieces (1, 8, 27, 64). "the cube grew" shows once.
• folded corner: a tile with a folded corner has a cube inside.
• flat then fold: flat means nothing inside yet; folded means there is an inside.
• a dimension belongs to the whole cube: added anywhere, it shows on every piece as "to be discovered".
• unknowns: pale or dashed, with a "not known yet" group kept when regrouping.
• leaves that act: when a leaf is an action (mosaic), it opens a sheet with its name and a way back to the cube.