📖 How to Play — Spectrum Sort

1. Click a tube to select it — it lifts up to confirm selection
2. Click another tube to pour the top ball from the selected tube
3. You can only pour onto a matching color or an empty tube
4. Each tube holds a maximum of 4 balls
5. A completed tube glows green when all 4 balls are one color
6. Win when every tube is either empty or all one color