Connect the numbers. Fill every square. That is the whole game — and it will keep you thinking for months.

NumberTrail is a number path puzzle. Draw one continuous line that runs through 1, 2, 3, 4 in order and covers every single square on the board. Ten seconds to learn. Level 1,375 is another story.

▶ HOW TO PLAY
• Put your finger on 1 and drag to 2, then 3, then 4
• The line never crosses itself and never skips a square
• Finish on the last number with the whole grid filled — that is a solve
• Stuck? Undo as often as you like, or spend a hint

★ WHAT YOU GET
• 1,375 hand-checked levels across 10 chapters
• Every puzzle has exactly one solution — pure logic, never luck
• 4,125 stars to collect: solve with no hints and no undo to earn all three
• 72 achievements, from your first trail to a perfect chapter
• 6 board themes unlocked with the coins you earn: Classic, Ocean Breeze, Candy Pop, Wooden, Neon Grid and Sketchbook
• Light and dark mode across the whole app
• Plays completely offline — no internet, no account, no sign-up

🧠 TEN CHAPTERS, A REAL DIFFICULTY CURVE
1. First Steps — learn the flow on small, friendly boards
2. Winding Roads — longer routes and your first real walls
3. Hidden Paths — more question marks, fewer obvious routes
4. Stone Walls — walls everywhere. Read them like clues
5. Mazeworks — irregular shapes and tight corridors
6. Night Garden — sparse clues on sprawling boards
7. Labyrinth — every wrong turn costs you. Plan ahead
8. Clockwork — precise routes through crowded boards
9. Summit — the biggest boards and the fewest hints
10. Grandmaster — only the sharpest minds finish here

Each chapter unlocks when you have earned enough stars in the one before it, so the difficulty never jumps ahead of you.

🎯 THINKING, NOT RUSHING
No countdown timer. No lives to lose. No energy bar to wait on. Spend five seconds or five days on a board — the puzzle waits. A clean solve is what earns three stars, so the challenge is on you, not on the clock.

🧩 IF YOU LIKE THESE, YOU WILL LIKE NUMBERTRAIL
Logic puzzles, sudoku, nonogram and picross, kakuro, mazes, connect the dots, one line drawing games, snake-style path games and brain training puzzles. If you enjoy filling a grid and hearing that click when it finally works out, this is your game.

☕ MADE FOR REAL LIFE
• A quick brain workout on the commute
• A calm few minutes before bed, sound off
• Flights, trains, tunnels and anywhere with no signal
• One-handed play — everything sits inside thumb reach

🎨 MAKE IT YOURS
Earn coins for every level you solve and spend them on board themes. Play under an ocean, on a candy grid, on a wooden table, on a glowing neon board or on hand-drawn sketch paper. Pick light or dark for the rest of the app and the whole game follows.

🏆 CHASE EVERY TROPHY
Solve your first level. Solve ten in a row without a hint. Beat a board in under thirty seconds. Take a full chapter to three stars. The trophy room keeps the history of every single one — what you unlocked, and which level you were on when you did it.

NumberTrail is free to play, small to download, and does not ask you to register.

Questions, a bug, or an idea for a level? Write to ideagrow2022@gmail.com — a real person reads every mail.