One Line Draw
Trace every glowing line of a shape in a single continuous stroke, without going over any line twice. A sleek, neon take on the classic one-stroke (Eulerian path) puzzle across seven shapes.
About One Line Draw
One Line Draw is the timeless 'draw it without lifting your finger' puzzle, dressed up in calm neon. Each level gives you a constellation of glowing dots joined by faint lines; your job is to light up every single line in one unbroken stroke, never tracing the same line twice. It looks effortless on a triangle and turns into a proper head-scratcher on the star, the house and the envelope. Under the hood it's a lovely bit of graph theory — only certain starting dots can possibly work — and the game quietly helps by making the valid starting points pulse. There's no timer and no penalty for experimenting: undo a step, retry the level, or tap Hint to reveal a next move when you're stuck. With smooth glowing trails and a satisfying snap as the last line connects, it's a perfect bite-sized brain-teaser for a quiet moment.
How to play One Line Draw
Start on one of the pulsing (glowing) dots, then drag through connected dots to light up the lines between them. Every line must be traced exactly once, and you can never go over a line you've already drawn. Cover all the lines in one continuous stroke to complete the level. Use Undo to take back a step, Hint to highlight a possible next line, Retry to restart, or Skip to jump ahead.
Controls
Press a glowing dot and drag through connected dots to trace lines (mouse or touch). Buttons: Undo, Hint, Retry, Skip.
Tips & tricks
- Begin on a pulsing dot — only certain start points can finish the whole shape.
- If a shape has two 'odd' corners, you must start on one of them and finish on the other.
- Plan a route that saves dead-end lines for last.
- Stuck? Undo back a few steps and try a different branch instead of restarting.
Play more free games
Romp has dozens of free HTML5 games — puzzles, racing, arcade, sports and 2-player games that run instantly in your browser. Browse all games →