Research Point: Metamorphosis
I haven;t read the short story before, but I read an extended plot summery and it seems like a very interesting and disturbingly sad story. From what i gathered, his days were affected by the door being opened or closed.
And the last ones are showing how artist place the insect on the bed, looking at the door, unable to move or open it. Really trapped inside the room, the body of this insect and not able to speak. I think the way the artist shows the human shadow really helps us to realize that the man gregor inside is still inside.