Half ~Simple Puzzle~

The rule is very simple!
Panel of up, down, left and right will be half by touching the panel.
It is a game to be cleared by one of the digits of the panel.
The game is over when you half a panel of 1

There are 700 stages in total. 
4×4 puzzle is easy, 5×5 puzzle is difficult.
So youre at random the difficulty of the stage, lets solve the problem that can be.

Doing little by little every day, lets clear the stage of all! !

This app was built for all ages to play . 
Play this when you are commuting to school, work, during classes, while you are eating, waiting for your cup noodle, or doing your business in the toilet. 

Send feedbacks and I may add more stages to crack your brains!