After getting zapped on both sets of stairs, B invoked Meko Charter rule 7015-A ... Spoiler "Use of free elements for cheating is hereby authorized as a counter-measure on any level found to be sufficiently mean spirited."
I found the mechanism fun and surprising. The last part is quite tricky. Spoiler The short cut they mentioned above is probably the "free"draggable ,the one that opens up the right cave. Players could use it as a tool to hit the win button. Though I did not do that , as it is not a free draggable level. Also i hope the low ceiling part could be more obvious, as i discovered the end route of B by accident...
Okay, so I found the designed way. Spoiler But not before B took a little revenge by using the free draggable to tear down the main metal platform. You can really wreak some havoc with that thing.