Good stuff!
I liked the whole idea of looking into the cell and moving around the layer.
What the guy said was good, the way it was said was good, the idea of it being a mouse was very good. As I have been thinking, my overall score has just gone up form 7 to 8!
I think I will put this in my favourites.
Thank you.
A little more sound might be good - maybe mouse/rat sounds or cell doors clanking in the background or distant voices.