Goal: Sort the colored balls so each tube contains only one color.

Rules:

• Tap a tube to select its top ball(s).
• Tap another tube to move them.
• You can only place a ball on the same color or into an empty tube.
• Tubes hold a maximum of 4 balls.
• Consecutive same-colored balls on top move together if there is space.

Use empty tubes wisely — they are your workspace!