The guy at the bottom is standing on a chair
, also it seems that you place some desks in wierd positions, like if it was a top down view, youd have like
[desk]
|_________[wall]_|
where the desk should actually be touching the wall... I mean, who puts desks like that
and a minor gripe, the carpet in the bottom left is a wierd shape, I'd remove the carpet in the halway and keep everything rectangular
otherwise, nice job