LineLoop: One Line Puzzle

300 one-stroke puzzles! Connect every line without lifting your finger. First 30 levels free, 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.

• Hundreds of puzzles that steadily get harder — new levels added regularly • 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 • Full-screen dark, neon aesthetic — sleek and easy on the eyes • First 30 levels free; unlock everything with a single one-time purchase (NO subscription) • No ads, no internet required — play anywhere, at your own pace

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