Screen

Phone sizes only apply when the space allows; otherwise the game fills what is left of the window.

Grid

rows 0 = as many square cells as fit the height; otherwise the cell shrinks so N rows fit.

Frame

Reserved areas (inside the grid)

Color

Motion

Tap a tile to flip it.

Your last settings are remembered on this device. "Copy link" carries every setting, so whoever opens it sees exactly this screen.