Nice work...impresive..... but u have slipt something :-?
1:the painting on the wall casts to much of a shadow
2:if the window is transparent and doesnt have any colour then outside it shouldn't be so....:-?
3:and u forgot to put a casting shadow on the man :-?..think that u forgot it because you added him latter
except those 3 i would say u've done a good work

P.S.
Keep up the good work