Here's an overview of the setting and gameplay in Q4 2020 release:
Lost Ruins of Arnak combines deck-building and worker placement in a game of exploration, resource management, and discovery. In addition to traditional deck-builder effects, cards can also be used to place workers, and new worker actions become available as players explore the island. Some of these actions require resources instead of workers, so building a solid resource base will be essential. You are limited to only one action per turn, so what will benefit you most now and what can you wait to do under the assumption that someone else won't do it first?
Decks are small, and randomness in the game is heavily mitigated by the wealth of tactical decisions offered on the game board. With a variety of worker actions, artifacts, and equipment cards, the set-up for each game will be unique, encouraging players to explore new strategies to meet the challenge.