Firstly I had something else in mind when I made the table. Now I see that I forgot to modify it. We really see a lot of the tabletop. About the light,I wanted to make it look like it is between the two objects and that's why I did the shadows in that way.(By the way,I may have done it in a wrong way). I really appreciate your comment. Thanks a lot. I will try to fix it.

The perspective is a bit off: We see a lot of the tabletop (too much), whereas the rest of the scene suggest a lower perspective. If the perspective on the table were right, you should be able to see the horizon or ground through the window. Additionally, the table appears to stand too close to the wall, judging by the width of the tabletop and the position of the table leg on the floor. Further, the floor texture needs to foreshorten.

The light is inconsistent, the table has a smaller shadow straight underneath, whereas the clock casts some shadow sideways onto the wall (and on the face of the clock).

I do like the grayscale style of your scene, it adds to the mood. I think you can make this work.