Feel the Line

Hidden Line is a new kind of puzzle game where you find hidden routes by tracing the screen with your finger.

The rules are simple.
Trace the screen and follow the vibration feedback. The closer you are to the correct hidden line, the stronger the response becomes. When you reach the next pass point, the completed line segment appears on the screen.

The correct route is not shown at the start.
Instead of following a visible path, you search for it through touch, movement, and feedback. Each stage is about slowly discovering the hidden line by feeling your way forward.

Routes are automatically generated, so the same line does not appear again.
Every play gives you a different hidden route to discover, making each attempt feel fresh.

As the level increases, the number of pass points increases by one, creating longer routes step by step.
You can also choose the reaction difficulty from Easy, Normal, and Hard, allowing you to adjust how wide or precise the vibration response feels.

Each play session takes only a few minutes.
It is designed for short breaks, commutes, waiting time, or whenever you want a quick puzzle experience.

Hidden Line is a paid app with no ads and no additional purchases.
Buy once and play anytime without interruptions.

Features:
- Find hidden lines through vibration
- Stronger feedback as you get closer to the correct route
- Completed line segments appear after reaching pass points
- Automatically generated routes with no repeated lines
- More pass points as levels increase
- Easy, Normal, and Hard reaction difficulty
- Short sessions that take only a few minutes
- Great for spare time
- No ads
- No extra purchases
- One-time purchase

Enjoy a puzzle experience that is not only about what you see, but also about what you feel.