In each step there are randomly chosen places on the map, where you can place tile. In each step, you can choose one tile from the two available.
Each tile "likes" and "dislikes" different tiles. For example a "meadow" tile likes to be surrounded by "forest" tiles. It means that if meadow is surrounded by forest, you will score more points.
When you run out of tiles and your tiny world is complete, the scoring happens. You can always choose "help" from the menu, to figure out the tiles rules.
There are two modes to play - a daily shuffle or random shuffle. It refers to the tiles you will get. Daily shuffle stays the same whole day. Random shuffle will be different each time you play.