How do you beat level 7 on snail bob 2

First, press the red button on the left. This will pull the metal ball to the nearby magnet. Next, pull the lever on the right. This will pull the cement slab to retract into the ground. Finally press the red button again to release the ball when the snail just reaches the edge. It should punt the snail onto the other side.

Source: That's how I just passed the level.