
Every butterfly on this board has been split in half. In Butterfly Shimai you reunite matching wings: pick two identical halves, and if a path between them is open, they join into a whole butterfly and vanish from the board. It plays like Onet Connect, wrapped in a soft and very pretty look.
The levels build on each other, so these habits matter more the further you go. For classic tiles instead of wings, switch to Mahjong Connect 5.