Place the three pieces in any order. Use them all to get three more. Pieces cannot rotate. You can also select a piece and tap its top-left position on the board, or use Tab and Enter.

Each block placed earns 5 points. A clear adds 50 × lines² × your combo multiplier. The first clear is ×1; each linked clear adds 1. You can make 3 non-clearing setup moves; the next non-clear ends the chain. A new tray does not reset it. For example, placing 4 blocks to clear 2 lines at ×3 earns 620 points.

New sets favour useful shapes and give you smaller pieces as the board fills. Every set has a way to place all three pieces, including any line clears. Your choices can still leave you stuck. Sets contain three different shapes, with at most one single block. If no such set can be made, the game ends with your final score. There’s no timer—take your time.

Stone awakens at 1,000, 3,000 and 6,000 points. Colours and runes are decorative: every block follows the same placement rules.

Reduced-motion preferences are respected automatically.