ONELINE: One-Stroke Puzzle

Relax, focus, and fill every cell — in ONE stroke.

ONELINE is a minimalist one-stroke puzzle. Each level is a little shape made of
glowing cells. Place your finger on a start cell and slide through the
neighbours, filling every cell exactly once, without lifting — one continuous
line. The cells light up in a satisfying rainbow as you go, and a burst of
confetti celebrates every solve.

Simple to learn, hard to put down.

★ FEATURES
• 100 hand-crafted puzzles, from gentle 12-cell shapes to tricky 30-cell mazes
• Cells as squares, circles or stars — the look changes as you progress
• Rainbow fills, glow, haptics and confetti for a juicy, satisfying feel
• Time Challenge — beat the clock and chase your best score
• Daily Puzzle — a fresh challenge every day, with a streak to keep alive
• Soft piano soundtrack to keep you calm and focused
• 100% offline — no account, no sign-up, play anywhere
• 6 languages: English, Français, Português, Español, Deutsch, العربية

★ WHY YOU'LL LOVE IT
• A true brain-teaser that's also deeply relaxing
• Pick up for 30 seconds or lose an hour — your choice
• Clean, dark, modern design that's easy on the eyes
• Smooth one-finger controls

No internet required. No account. Just you, your finger, and one perfect line.

Fill it in one stroke. Can you complete all 100?