HueHarbor

I. Core Objective​
Tap test tubes to pour colored liquids, sorting each color into a single tube (one color per tube). A relaxing logic puzzle perfect for fragmented time!​
II. Core Touchscreen Controls​
1. Pouring Operation (Intuitive Taps)​
Tap any test tube to select it (it will glow slightly), then tap another tube to pour the top layer of liquid;​
Single-finger control: No dragging required—simple taps complete pouring, with no hand fatigue during extended play.​
III. Clearance Rules & Restrictions​
Pouring Conditions (must satisfy both):​
The target tube has empty space (not full);​
The top liquid color of the selected tube matches that of the target tube (or the target tube is empty);​
Clearance Requirements:​
All test tubes contain only one color of liquid (no mixed layers);​
No time limits — plan at your own pace, with no penalties for wrong moves.