VEXO: One Line Puzzle Duels

VEXO is a one line puzzle with a twist: solve it on your own, or race real players on the exact same puzzle in a live duel. All 1,000 Solo levels also play offline, on a plane or on the subway.

The rule fits in one sentence. Draw one continuous route that uses every edge exactly once. You can't use an edge twice, but you can pass through a dot again. Tap from dot to dot, draw with your finger, or let Auto mode switch between the two. It's the classic one line puzzle, also known as one-stroke drawing, built on Euler paths (the math behind the Seven Bridges of Königsberg), and it gets tricky fast. Remember the childhood puzzle of drawing a shape without lifting your pen? Now you do it with your finger.

Solo: 1,000 levels in 50 chapters
• Start with simple loops and work up to tangled networks across 10 difficulty tiers
• The game checks every level to make sure it can be solved
• A chapter bonus every 20 levels, and Endless mode after level 1,000
• Replay any solved level from the Level Map and beat your best time
• Undo a move or restart whenever you like

Play offline: on a plane, on the subway, no Wi-Fi
• All 1,000 Solo levels in 50 chapters play without an internet connection
• Open VEXO online once to sign in; the levels are then saved on your phone
• Levels you solve offline sync to your account when you're back online and count toward your progress and leaderboard score
• Chapter bonus Credits are claimed once you're back online
• Live duels, the Daily Challenge, the Weekly League, Endless mode, hints, Credit Skip, Ask a Friend and the shop need internet

Stuck on a level?
• Hints: reveal a starting route, the next step, or the full solution
• Credit Skip: spend Credits to move on to the next level
• Ask a Friend for Help: send that exact level to a friend. If they solve it, you move on

Daily Challenge
• One puzzle every day, the same for every player worldwide
• One attempt, a real timer and a daily leaderboard
• Keep your day streak going

Live duels
• Challenge a friend with a link or a room code
• Duel looks for a real opponent in your own tier (Bronze, Silver, Gold or Diamond) whenever one is online
• Up to 5 players race on the same puzzle, and the server checks every finish
• Multiplayer opens after your first 15 Solo levels

Weekly League and leaderboards
• Climb the Global Top 100 and the Weekly League
• The top 3 players each week earn bonus Credits
• Daily and room leaderboards too

Group Rooms for friends, classes and offices
• Set up a permanent Group Room for your friends, class or team
• Each group gets its own standings, separate from the global league
• Need something quick? A temporary room clears itself after 24 hours without play

Reaction Cam (optional, multiplayer only)
• In duels, you can let the front camera snap your reaction when you win or lose
• Your opponents see it on the result screen
• The camera stays off until you agree, and you can always play without it. Solo puzzles never use the camera
• Report a photo or block a player at any time

Make it yours
• Six themes: Candy, Sunset, Notebook, Chalkboard, Retro Arcade and Zen Garden
• Chalkboard draws the puzzle in hand-drawn chalk, Retro Arcade turns it into an 8-bit arcade screen with a CRT glow, and in Zen Garden the sand of a Japanese zen garden moves under your finger
• Each theme has its own colors and sounds
• Unlock trail skins, node skins and sound packs with Credits

Tap or draw. Use every edge once. See how far one line can take you.