DemoOnly the demo is playable right now.

There’s a whirlpool on the ocean. Should you feed it? It sits just off a tiny island, turning slowly, never stopping. There’s a cabin with a bed and a wooden pier. And there are rubber ducks, lots of rubber ducks. Throw one in and the whirlpool swallows it. It grows a little. The sea drops a little. A coin comes flying back out. Mouse and keyboard. Available in 17 languages. Made by Drain Studio.
GulpluG has a free demo, and that is what this page links to. The full game isn't playable from here yet.
GulpluG is available on Browser, itch.io and Windows.
GulpluG is an incremental idle game, featuring prestige, cozy, 3D and puzzle.