The game objective is to use the rotating 10 types of cards in the middle and always available upgraded coins to buy victory points. Can be very strategic with two players and is lots of fun because the 10 cards in the middle always change game to game. With even 1 expansion it really improves the flavor.
I really enjoy board game adaptation of Dorfromantik.
Its a rather relaxing co-op game.
There's also a "Duel" version of the game were two players (or teams) compete by playing with the same sequence of tiles. :)