Earn points by putting star tiles next to each other to create constellations.
You play one after the other, on the same screen (local multiplayer). On their turn, each player picks up a tile, and must put that tile on the board (it's always doable), next to any other existing tile. The constellation paths must match.
When a player "closes" a constellation (ie: all constellation paths end up to a star), then they earn 1 point per white star in that constellation.
Winner is the player with most points once the last tile is placed on the board.