Astral Nine
Astral Nine is a traditional Sudoku puzzle reimagined as a celestial observatory. Tap a pulsing uncharted star cell and chart the numbers 1 through 9 exactly once across every row, column, and quadrant. Correct placements connect constellations across the night sky, and finishing the board before dawn produces a personal observation badge. A completion card celebrates your solve with your total time, move count, and a miniature snapshot of the finished board, which you can share to the community or replay instantly. The experience is mobile-first and touch-only, with an English default and an optional Chinese toggle, no login, no external services, and no background music.
Created by haojie.huang
