OneLine - One-Stroke Puzzle [iPhone]

A brain training puzzle where you draw 1 line, which will sharpen your wits!
In this free-to-play puzzle game, you have to draw one line. It is deceptively simple but profoundly deep.
Play through the hundreds of stages, sharpening your wits as you have fun.

Summary
This is a brain-training puzzle game that activates your mind while you play.
When you've got a spare moment, on your daily commute, or before going to bed, why not experience what it feels like to activate you mind?

How to play
There is just one rule:
"Connect all the points with just one line."
It does not matter where you start.

There are some overly fiendish tricky, complicated puzzles among the large number of stages.
If you get stuck, make use of a hint.

Stages
There are over a total of 300 stages.
It starts off with simple shapes, but each time your level increases, the number of lines increases, and it gets more complicated.
You might think it's too easy early on.
However, clearing the simple stages is also important.
The hints to clearing the later, more complicated stages can all be found scattered through the simple stages.

Some unique types of line, such as "one way lines" and "overlapping lines", can also be found throughout the stages.
These special lines encourage your imagination.

Use this chance to activate your mind as you play, by trying to solve this free-to-play brain-training puzzle game now!
You're sure to get hooked!