Number Tubes

Number Tubes is a minimalist yet challenging puzzle game that combines color sorting logic with mathematical calculations. It's designed to train players' organizational skills and numeracy skills in a relaxing yet competitive environment.

Here's a complete description of the game:

### 1. Main Concept: "Sort and Merge"

Players are presented with several clear test tubes containing balls or liquids with specific numbers inside.

* Mission:** You must arrange the numbers into the correct tubes according to a specific rule (for example, sorting from smallest to largest, or adding the numbers in one tube to reach a certain target).

### 2. Game Mechanics

* Move Numbers:** You can only move a number to another tube if there is still free space in that tube or if the moved number has a value that matches the combination.

* Merge Mechanic: If two balls with the same number meet in a tube, they will merge into a larger number (similar to the game concept of 2048), making more space in the tube.
* Limited Tubes: The challenge is that there are a limited number of empty tubes. A single wrong move can fill the entire tube and you can't move anymore (stuck).

### 3. Highlighted Features

* Zen Mode: Play without a time limit for relaxation, perfect for sharpening your brain in your spare time.
* Challenge Mode: Solve puzzles with a limited number of moves or under time pressure.
* Modern Laboratory Visuals: Clean interface design with satisfying fluid sound effects (ASMR) as the numbers move between tubes.
* Tube & Ball Skins: Unlock various tube designs with neon, crystal, or other futuristic themes.

### 4. Why Is This Game Fun?

* Highly Addictive: The satisfying feeling of seeing a mess of tubes become neat and organized.
* Brain Exercise: Indirectly improves strategic planning skills and basic mathematical logic.