SERIOUSLY. I DARE YOU.
LEVEL TWENTY ONE, O, HOW THOU HAST DESTROYED MINE SANITY.
Seriously, though, it's pretty amazing and I felt really smart getting thus far, but it's driving me bonkers, mad, insane, this level. Try it, though.
(Note: This post is not responsible for any defenestrated or otherwise harmed computers or bodies if the test is actually attempted).