Rolling ball falling down with gravity acceleration.
You have to rolling ball fall down through gaps between platforms as fast as possible. Don't keep stay the ball on platforms, saw blade also falling down very fast. Once you let saw blade catch up the ball , you do not have much chance to escape! Find out nearest gap to go throught, the ball will fall down with gravity acceleration until it reaches other platform. Notice tap on the right side of screen to rolling ball right and left side for rolling left.

That's all! Now Falling ball challenge your fingers!