Brain Crusher 3000

Simple but challenging puzzle game, that will test the limits of your patience.

Fill all 7 boards, from the easiest to the hardest.
Don't be fool by the smallest boards. The difficulty level increases exponentially with the size of the board.


Goal:
You have a partially filled board divided in squares. The goal is to fill the entire board.

How to play:
When you touch a square in the board, whether it has a piece or not, all direct neighbours (up, left, right and down) and the square itself flips its contents.
So, if the square had a piece before, it will become an empty space afterwards.
However, if the square was empty, then it will receive a piece.


Good luck.