Hmm, very nice....very sad. I went through it pretty fast so I might have missed some things, but two sentences popped out at me.
The first was when Glade got to the fourth floor and you mention by the time he got there he was in a sour mood. When I read that, I thought, "Gee, hasn't his mood been sour since the start?" Perhaps you could change it to say his mood was worse by then, but I think he was already sour...
He flopped down hard on his couch, which was already broken anyway.
Either take out the "already", or the "anyway". The line currently feels
redundant.
Excellent writing as usual.