Merge and Decor pairs a merge puzzle with a home renovation: you find and combine items to produce more useful ones, earn stars for doing it, and spend those stars restoring and decorating an old mansion room by room.
The two halves reinforce each other — the merging is what you do, and the mansion is why you keep doing it.
By merging and combining items. Stars are the currency spent on restoring and decorating the mansion's rooms.
Yes — each room offers several design options, so the mansion ends up looking the way you decide.
Yes — drag to merge. Nothing to install.