Fill - one-line puzzle game
Puzzle
5 Million+ installs
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- CategoryPuzzle
- PlatformAndroid
- DeveloperGamincat
- In-app PurchasesYes
- Installs5 Million+
- Updated2026-05-01
- Size57 M
- Version8.8.0
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Editor's Review
Fill - one-line puzzle game is a puzzle game from Gamincat. Its store tagline reads: "Sharpen your mind with a one-line block brain training puzzle game." With 5 Million+ installs on Google Play, it holds an average rating of 3.8 from 60.4K user ratings. The latest version (8.8.0) was released on 2026-05-01, so the game is still being actively updated. Good to know: it offers optional in-app purchases and needs about 57 MB of storage.
How To Play?
Install Fill - one-line puzzle game from Google Play and open it
Go through the opening tutorial to learn the controls
Take your time on harder levels and look for patterns before moving
Check the settings to adjust sound, graphics and notifications
Keep the game updated to get the latest content and fixes
Google Play
Description
Sharpen your mind with a connect-the-block-style one-line brain training puzzle game.
A simple but addictive one-line puzzle game that’s completely free to play.
Your brain becomes more active the more you play.
During your commute, before you sleep… enjoy downtime with brain training.
The rules are extremely simple.
Just fill in all of the blocks using only one line.
Use hints for puzzles that are too hard to solve.
Hints are also free, of course.
4 levels of difficulty.
A whopping 2,000 puzzles.
Don’t get too cozy—the puzzles get harder as you go along.
One-line puzzles are mathematical problems with origins in the early 18th century. First posed in Königsberg, the original puzzle revolved around the town’s Pregel River.
Mathematical thinking is said to increase work efficiency and prevent aging.
Whether math is your bane or your forte, be sure to give this game a try.
You’re sure to get hooked on these puzzles!
Screenshots
3.8
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