Rollo: One Line Puzzle

Swipe. The ball rolls until it hits something and paints its path. Paint is a wall — you can't cross it. Fill every tile to finish the level.

You learn the rule in 10 seconds. Mastering it takes much longer: take the wrong order and your own trail traps you in a corner.

1000 LEVELS, ALL SOLVABLE
• Every level is verified by a solver — every single one has a solution
• Difficulty ramps up gently; each new obstacle is introduced with a live example
• Portals, arrows, cracked tiles, one-way gates, keys and switches turn every level into a new puzzle

A NEW PUZZLE EVERY DAY
• The Daily Puzzle is the same for everyone — see how many players solved it today
• Keep your streak going and earn hints

COMPETE AND CLIMB
• iPhone and Android players on one leaderboard: Daily, Levels, Streak and Mastery
• Earn titles from Novice to Genius and show off your emblem
• Collect stars on every level: shortest path, first try, no undo for 3 stars

NEVER STUCK
• No timers, no game over: undo any move and try again
• A hint shows the next correct move
• Really stuck? Tap Solve and watch the full solution

YOUR PROGRESS IS SAFE
• Game Center achievements and leaderboards
• Progress is backed up to the cloud — reinstall and pick up where you left off
• Plays offline, too

CALM AND CLEAN
• Minimal black-and-white design with light and dark mode
• Soft notes on every swipe — each level plays a little melody
• One thumb, portrait; available in 8 languages

On the subway, in line, on a coffee break… short levels, long fun.

Rollo is free and contains ads. A one-time "No Ads" purchase removes banner and interstitial ads. Hint and solve packs are optional.