OneStroke - Brain Puzzle

Draw the whole shape in a single line — without lifting your finger and
without retracing any line. It sounds simple. Then you reach Cassiopeia.

OneStroke is a calm, glowing brain puzzle built on a classic math problem
(the Eulerian path) and turned into 84 hand-crafted levels of constellations,
mandalas, animals, and famous landmarks. Each level has a single elegant
solution that's hiding in plain sight.

* 84 hand-crafted levels across 6 themed chapters
* Constellations chapter — trace Orion, the Big Dipper, Cassiopeia, Cygnus, Lyra and more
* Mandalas chapter — meditative radial patterns
* Animals chapter — dot-to-dot creatures
* Landmarks chapter — Eiffel Tower, pyramids, Stonehenge and more
* Daily puzzle — a new challenge every day
* Hint system if you get stuck (or just skip)
* 4 glow themes — Midnight, Aurora, Sunset, Forest
* Calm Web-Audio sound design
* 100% offline — no account required, no internet required
* Works on tablets too

OneStroke is built for short, satisfying sessions. Most levels take 30 to 90
seconds. The art breathes. The line glows. You leave feeling sharper than
when you arrived.

No paywalls. No mandatory ads. No data harvesting. Optional rewarded ads if
you want a hint, and an optional one-time purchase to remove all ads.

If you like one-line puzzles, dot-to-dot drawings, brain teasers, or just
need 5 quiet minutes — give OneStroke a try.