About This Demo

A cozy sudoku for the end of the day, with a cat for company and a lo-fi radio under the rain. Solve tonight’s puzzle and it becomes a star in your sky.

Twenty puzzles, five at each difficulty from Easy to Expert, all solvable by logic alone. Every world, every coat, the radio and the weather mixer are here; achievements come with the full game.

The Nightly isn’t cut down at all (it just needs a connection): one board a night, the same for everyone. Your stars join up into constellations, and missing a night never undoes one.

The demo and the full game share one save, so every star you place now is still in your sky when you buy, along with your streak and your cat’s coat.

The full game has 5,000 puzzles of its own (1,500 Easy, 1,500 Medium, 1,250 Hard and 750 Expert) and 17 Steam achievements.

Put the kettle on. The board’s ready.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Some of MoonDoku's art and audio was made with generative AI tools while I built the game: the animated world backdrops, the MoonDoku FM music, a few sound effects, parts of the store and icon art, and a handful of smaller in-game images. I directed, edited, and composited all of it by hand.

Everything else is made without generative AI. The puzzles come from my own deterministic generator, the cat is a commissioned 3D model I animated in Blender, and the game design & layout are directly from my brain.

Nothing is generated while you play, and the game never talks to an AI service.