Stanley was fat and ugly and really really stupid. He probably only got the job because of a family connection, that's how stupid he is. That or with drug money. Also Stanley is addicted to drugs and hookers.
Why couldn't he see his feet when he looked down? Why did doors close automatically behind him wherever he went? And for that matter, these rooms were starting to look pretty familiar. Were they simply repeating?
"What? What's this cube doing here? It's not a part of my story. Where did it come from?
Okay Stanley, listen to me here; you're just going to step around it and keep following the Adventure Line. I'll work out what that cube-thing is later. For now, just ignore the cube, and keep walking."
Are you shure you don't want to put a mature content filter on this thing? I mean, we don't want any little cubes looking at little adventure lines™ getting it on with each other, do we? (Just Kidding.)