One Line Pop!

One Line Pop! is a free one-stroke puzzle game where you draw a shape consisting of fixed points (nodes) and lines (edges) on the screen by tracing every edge exactly once without lifting your finger. The rules are simple, but the game offers depth in figuring out the optimal order to complete the shape.

■ Features

・Easy One-Stroke Drawing Rules
Simply touch a node to start, then drag your finger to the next node. The edges in between are automatically traced. No complicated operations are required.

・Don't Be Sorry, Undo and Reset
You can undo the edge you just traced by moving your finger back. If you get stuck, reset and start over. There are no penalties, so you can try again as many times as you like.

・Star Ratings Show Your Completion Quality
Achieving a one-shot completion without retries or hints earns you 3 stars. The number of stars changes depending on the number of undos and resets used, and whether hints were used. You can try the same level again and aim for 3 stars.

* Gradually Increasing Difficulty Level System
Starting with simple shapes that have few nodes and edges, you can draw them from anywhere. As you progress, the number of nodes and edges increases, and shapes requiring careful selection of the starting point appear.

* Hints to Help When You Get Stuck
You can display hints for starting points, showing you where to begin drawing. This is a helpful tool when you get stuck on difficult shapes.

* Completely Free & Playable Offline
No internet connection is required. Play anytime, anywhere—on the train, in places without Wi-Fi, etc. There are no in-app purchases; it's completely free to play.

* Automatic Save to Continue Anytime
Your current level and earned stars are automatically saved, so you can resume from where you left off even after closing the app. You can also pause at any time using the pause button.

■ How to Play

1. Start by touching any node (point) in the shape.
2. Drag your finger to an adjacent node to trace the edges in between.
3. Using the same logic, proceed by selecting only the edges that haven't been traced yet.
4. Clear the level when you've traced all the edges. Check the number of stars you've earned.
5. If you get stuck, move your finger back to undo or reset to try again.

Tip: At forks in the road, the quickest way to completion is to "not leave edges that seem like dead ends for later." If you get stuck, don't panic, reset, and try a different order.

■ Recommended for:

・Those who like one-stroke drawing and Euler path-type puzzle games.

・Those looking for puzzles with simple rules that require careful thought.

・Those looking for level-based puzzles that can be easily played in short bursts of free time.

・Those who like stress-free games where you can try again after making a mistake.

・Those looking for offline games with no in-app purchases.

■ Terms of Use and Advertisements

This app is free to use. Advertisements (Google AdMob) will be displayed. There are no in-app purchases.