Cover art for Number Tubes

Number Tubes

Sort and merge numbered balls in tubes to create higher numbers

BlockNumber Tubes
7.9(467 votes)

Number Tubes

Number Tubes — Merge Numbers and Master the Art of Tube Management

Number Tubes - Merge Puzzle Game

Number Tubes blends the addictive merging mechanics of 2048 with strategic sorting puzzles, creating a unique challenge that tests your planning and spatial reasoning. Manage four tubes filled with numbered balls, moving and merging identical numbers to create larger values while preventing your tubes from overflowing. Every move in Number Tubes matters — merge too slowly and new balls will clog your tubes, but rushing without strategy leads to unsolvable configurations.

🎮 What is Number Tubes?

Number Tubes is a number-merging puzzle game where you manipulate colored balls containing numbers across four vertical tubes. The objective is simple: click a ball to select it, click a destination to move it, and merge identical numbers together to create higher values.

The gameplay loop mirrors 2048's satisfying progression — two balls with the number 2 merge to create 4, two 4s become 8, two 8s become 16, and so on. But unlike 2048's grid-based system, Number Tubes adds the constraint of vertical stacking. Balls stack from bottom to top within each tube, and you can only interact with the top ball or move entire stacks together.

After each move, new numbered balls drop into the tubes, gradually filling your available space. The challenge intensifies as tubes fill up — you must continuously merge balls to create free space, or risk a game-ending situation where all four tubes are completely full with no possible merges.

đŸ•šī¸ How to Play Number Tubes

Basic Controls

Number Tubes uses intuitive mouse or touch controls:

  • Click a ball – Select the top ball from any tube (or an entire stack of identical balls)
  • Click a destination tube – Move the selected ball(s) to the top of another tube
  • Automatic merging – When identical numbered balls meet, they automatically combine
  • Watch new balls arrive – After each move, new balls are added to the tubes

Core Gameplay Mechanics

  1. Survey the Tubes – Examine the numbers and positions of balls in all four tubes
  2. Select a Ball – Click on the top ball of any tube to pick it up
  3. Choose Destination – Click another tube to move the ball there
  4. Merge Identical Numbers – When two identical numbers touch, they combine into one larger number
  5. Create Space – Continuously merge balls to prevent tubes from filling completely
  6. Handle New Balls – After your move, new balls appear, adding pressure
  7. Strategize Ahead – Plan multiple moves in advance to create optimal merging opportunities
  8. Avoid Game Over – Don't let all tubes fill up with no possible merges

Merging Rules

Understanding merge mechanics is crucial in Number Tubes:

  • Identical Numbers Only – Only balls with the same number can merge (2+2, 4+4, etc.)
  • Automatic Combination – Merging happens automatically when identical numbers touch
  • Stack Movement – You can move entire stacks of identical balls together in one action
  • Top Access Only – You can only move the top ball(s) of each tube, not balls buried deeper
  • Progressive Doubling – Merged numbers follow 2048 logic: 2→4→8→16→32→64→128, etc.

Strategic Movement Patterns

Success in Number Tubes requires thinking several moves ahead:

  1. Create Merge Opportunities – Move balls to position identical numbers adjacent to each other
  2. Manage Tube Space – Keep at least one tube relatively empty for maneuvering
  3. Stack Same Numbers – Build stacks of identical numbers to move them together efficiently
  4. Avoid Blocking – Don't bury high-value balls beneath low-value ones
  5. Plan Merge Chains – Set up sequences where one merge enables another

📸 Number Tubes Gameplay Walkthrough

Number Tubes Starting Setup - Analyze Ball Positions

🎲 Initial Configuration

Every Number Tubes session begins with numbered balls distributed across the four tubes. Your first action should be careful observation: which numbers appear most frequently? Are there any immediate merge opportunities? Which tubes have the most free space? In this planning phase, identify quick wins — pairs of identical numbers that can merge immediately to free up space. But also consider longer-term strategy: if you merge those 2s now, will it block access to the 8s beneath? Strategic thinking separates high scorers from those who react impulsively.

Number Tubes Ball Movement - Execute Strategic Moves

🔄 Moving and Merging

The core action in Number Tubes is selecting and moving balls. Click a ball showing "4" at the top of tube one, then click tube two where another "4" sits at the top. The balls meet and automatically merge into "8," freeing up space. This simple mechanic becomes complex when you manage multiple numbers: should you merge the 2s to create a 4, or move that 8 to access the 16 beneath it? Notice how moving entire stacks of identical balls lets you relocate multiple numbers in a single action, a powerful technique for reorganizing your tubes efficiently.

Number Tubes Tube Capacity - Manage Limited Space

📊 Space Management

As you play Number Tubes, the constant influx of new balls creates mounting pressure. After each move, more numbered balls appear, slowly filling your four tubes. This is where strategic merging becomes critical — you're not just combining numbers for points, you're fighting for survival. Watch the fill levels carefully. If three tubes are nearly full and the fourth is halfway, you're approaching danger. Merge aggressively to create breathing room, focusing on the most crowded tubes first. One tube filled to capacity isn't a problem; all four tubes full with no merges available means game over.

Number Tubes Advanced Strategy - Create Larger Numbers

đŸŽ¯ High-Value Merges

The ultimate goal in Number Tubes is creating the highest possible numbers through continuous merging. When you successfully combine two 64s into 128, or two 128s into 256, you experience the satisfying payoff of careful planning. These high-value merges don't happen by accident — they require protecting and cultivating larger numbers while efficiently clearing smaller ones. Notice how expert players deliberately create "merge ladders" where they maintain one of each number in sequence (2, 4, 8, 16, 32) to efficiently process new balls. Each small number merges up the ladder, eventually contributing to the largest value at the top.