The Impossible Shape

This is a very challenging game, not only it can boost your brain, even more it can inspire your potential.
How to play:
When the red square is a rest, click on the black square, so you can eliminate the black square.
Note:
1 black squares fell out of both sides of the screen, it will self-destruct.
2 red square fell out of the sides of the screen, or is not the final one landing immediately judge fails.
Playing tips:
Timing and skills