In the world of Treelings, construction is well and truly underway in preparation for the annual firefly festival! Beautiful, glowing swarms of fireflies may be released only from the highest towering platforms in the city during the upcoming summer solstice. Six different guilds reside in the city, and they will do everything possible to build their own tree as high as possible in each district. As chief of your district, each round you decide which guild you want to support in your part of the city as you want to lure the spectators to your show on festival day and to send as many brightly-glowing fireflies to freedom as possible.
On a turn, a player takes all the cards of one color from the market or one card of each color that appears only once in the market; they then add these cards to their collection. Then they refill the market. When the firefly festival card is revealed, the game ends after each player has taken the same number of cards. To score, players look at each column of cards in their collection and compare the number of cards in it to the number of cards in the columns to the left and right. For the columns on the outer edge of a collection, players compare their height to the height of their neighbor's closest column.