LineLoop: One Line Puzzle

LineLoop is a calm but brain-teasing one-line puzzle game.

Connect every line in one continuous route. Trace each line once; you can pass through dots as often as needed. In Classic, you can lift your finger once and continue from the last dot; twice on long levels. Pull back to undo your last line. Expert and competitive modes require completing the route without lifting your finger.

• 1000 unique puzzles across Classic I and Classic II, with rising difficulty in every 10-level stage
• Finding the right start and the right order takes real planning — a wrong move strands you
• Familiar shapes from the very first levels — heart, rocket, house, plane, fish, ship, bicycle, butterfly — with cat, key and flower later on
• Two-step hints when you get stuck — using a hint reduces the level score
• A campaign-independent daily puzzle shared by everyone
• Home Screen widget: your daily streak and today's puzzle at a glance (iOS 17 and later)
• A very hard weekly Master Challenge with its own leaderboard
• Stage medals, clean-solve streaks, and 15 Game Center achievements
• Full-screen dark, neon aesthetic — sleek and easy on the eyes
• Adaptive iPhone and iPad interface, with portrait and landscape play on iPad
• All puzzles and modes are free, with no ads. You can optionally support the developer in Settings; support unlocks no extras and gives no advantage.
• Progress automatically syncs through iCloud across devices using the same Apple Account
• Game Center friends' level progress, turn-based same-puzzle time races, and live duels
• No ads; puzzles play offline (iCloud, Game Center, and purchases require internet)

A coffee break, a commute, or before bed: one puzzle in a couple of minutes to clear your head.