Five themes, and none of them is a setting you have to find. They're across the top of the menu — a light one, a dark one, mint, lavender, blossom — and the board changes while you're looking at it. I mention it because a puzzle is a thing you sit with for twenty minutes, and twenty minutes on a screen that suits the room you're in is a different twenty minutes. That's not a feature so much as a courtesy. ⊞