I can't seem to know what this level is either (just posted on the 'last level' thread).
Also, don't understand that gif at the bottom, why doesn't the ball attach? I tried to repro and it does. Is there another ball adjacent to it somewhere?
Yes, there is another ball off to the side. The quirk the gif is showing off is that the chain doesn't attach if it is on the same tile as the ball.
