LineLoop: One Line Puzzle

Race friends on the same puzzle or meet live in a duel! 1000 one-stroke puzzles, no ads.

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

In every level, draw all the lines in ONE continuous stroke — without lifting your finger. Each line is drawn exactly once; you can pass through nodes as many times as you like. Pull back to rewind your last line, so you can experiment freely.

• 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 (envelope, fish, cat, flower, bicycle, key…) sprinkled throughout • Two-step hints when you get stuck — using a hint reduces the level score • A campaign-independent daily puzzle shared by everyone • 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 • First 50 levels free; unlock the remaining 950 and future levels with one purchase (NO subscription) • 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.