Connect the Dots. Clear Your Mind.
FILL THE RAINBOW
Welcome to Fill the Rainbow, the minimalist one-line puzzle game that merges relaxation and mental sharpness in one beautiful experience. Over 1,000 handcrafted puzzles await.
About the Game
Simple Idea. Endless Challenge.
Fill the Rainbow is more than just a game — it's a meditative journey for your brain. Inspired by classic one-stroke puzzles dating back to the 18th century, the gameplay is intuitive: start from the first dot and connect all others in one continuous path.
There’s no need for timers or points — just you, the puzzle, and the rainbow. The logic may be simple, but the deeper you go, the more strategic thinking it demands. Whether you play to relax or to sharpen your problem-solving skills, this game adapts to your rhythm.
Daily Puzzles and Infinite Flow
Fresh Challenges, Every Day
Fill the Rainbow includes over 1,000 levels — from gentle mind warm-ups to complex brain teasers. New layouts are added regularly to keep you engaged. Don’t rush. Take your time. The beauty of this game is in the journey. Whether it’s during a commute, before bed, or while waiting for coffee, Fill the Rainbow fits perfectly into your day.
Immersive and Relaxing Design
Visual Calm, Mental Focus
We’ve crafted an environment that calms your senses:
- Soft rainbow gradients with underwater-style background
- Gentle bubble animations and sound effects
- Smooth transitions and minimalistic controls
Three background themes (blue, purple, red) and 13 tile styles — including Ribbon, Emoji, and Flower — let you personalize the atmosphere.
Brain Power Meets Simplicity
Puzzle Solving is Brain Training
Each line you draw is an act of logic and strategy. One-line puzzles strengthen cognitive functions such as spatial thinking, sequencing, and planning.
Even five minutes a day can increase mental flexibility and help keep your mind sharp. Scientists have even traced the origins of such puzzles to historical mathematical problems — now it’s your turn to join that legacy.
Smart Hint System
Never Stuck, Always Supported
Sometimes, the path forward isn’t obvious — and that’s okay. Our intelligent hint system offers support just when you need it:
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Preview the next move
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Show a full solution (if you really want it)
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Hints are always free
Solve at your own pace, with or without help.
Offline Mode, Online Zen
Play Anytime, Anywhere
Fill the Rainbow works perfectly offline. Play while traveling, during flights, or when you just want a quiet break from the digital world. No internet needed. No intrusive ads. Just the game, whenever and wherever you are.
Customize Your Tiles
Make It Yours
From classic rainbow gradients to cute emoji tiles, Fill the Rainbow includes 13 unlockable tile sets. Switch styles to match your mood or challenge yourself by playing with more complex visual themes.
Bonus: seasonal themes available during updates!
Features Overview
Everything You Need for a Mindful Puzzle Journey
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1,000+ handcrafted puzzles
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13 tile themes & 3 background colors
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Adaptive hints (always free)
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Relaxing soundscape & animations
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Offline play supported
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Universal sync between phone & tablet
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Regular updates with fresh puzzles
Screenshots Gallery
Experience the Flow
Download Now
Your Brain Deserves a Rainbow Moment
Fill the Rainbow is your go-to companion for mindful challenge and calm entertainment. Whether you're looking to train your brain or simply slow down and breathe, this game offers a colorful path forward.
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1,000+ puzzles to clear your mind
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Scientifically rooted puzzle mechanics
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Perfect on-the-go, even offline
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Totally free to download and play