Level 12 is a pain
But all the other ones are fairly straightforward. Level 14 was a cinch. I think once you've got the concept behind completing 12 it helps with the others.
*Spoiler for 12*
From the start, move the Short block to far right of top row, and disconnect from it. Connect to the left end of Short and move it down to join Long at the bottom left. Move Short and Long together to the right and then take them to the top, where you should automatically disconnect from them. Move around to the left end of the Long block and pull it through to the other side. After you've done this, you should be able to finish it yourself.
(, Thu 20 Dec 2012, 11:01, Share, Reply)