There are some squares in a rectangle matrix.
Many rotations can make a target image.
It seems like a flat Rubik's.
There are many different sizes, e.g.
Yojic34, Yojic36, Yojic66, Yojic77...etc."
The YojicC20 is a lite version of YojicA77.
and has Only 20 typical target goals
Some puzzles are not easy.
By touching, you can move the squares.
Small picture is your target goal.
You shuld make the same image.
Yojic Puzzle needs a lot of your ideas.
Yojic will make your brain clear.
Just 5 minutes Every day Training
Maybe, you can find many new better ways.
It will improve your geometric ability.
It is better for a Tablet device.
Anyway, please, give it a try.
Details (Google Search: Yojic Matrix)