Oh yeah, and WOW at the ending. Twisted, sad, just WOW. It reminded me of the ending to the movie The Mist where you just sit there and say What. The. F**k!!
For 19, you just build a stairway, go to the edge of the pit, clone, stand on top of it but a bit to the right, repeat, sooner or later you'll get across. You need to get 4 across to be able to reach the box.
 "The Company of Myself"){kind=icon}