What is Kalypso? Game Overview and Mechanics

About Kalypso, from BoardGameGeek:

Kalypso is a tile-laying survival game where players build floating settlements in a world swallowed by the sea. With Earth's surface lost beneath rising waters, survivors must salvage what they can to endure storms, overcome scarcity, and adapt to a shifting oceanic landscape. Each round, players draft tiles and expand their settlement, managing resources, placing structures, and guiding survivors across platforms of rusted metal and driftwood. Strategic placement unlocks new opportunities, while weather events and shared objectives push players to cooperate, or compete, for precious supplies. Play solo, cooperatively, or competitively. With modular objectives, and escalating difficulty, Kalypso offers a new challenge each time you set sail. -description from the publisher