- Tiles have two states: dim = off, glowing = stitched.
- Goal: make every row and column match its
parity blueprint (EVEN or ODD stitched tiles).
- Controls: tap tiles, or drag across them, to flip their state.
- Indicators: edges show the target parity and light up when satisfied.
- Combos: finishing multiple rows/columns in one streak builds your combo and score.
The board is generated from a hidden valid pattern, so every seed you see is guaranteed solvable.