As for the line, I assume you're referring to the yellow line of paint you're supposed to follow, but can choose not to?
It will bevery important later on in the story, you don't want to miss anything.
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?
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."
Don't forget the important fern.