What the others said...
I think the noise and dithering are working against the readability of the scene, esp. since this is low-res. The table almost disappears. A quick example how clearer light/shadow definitions and more simple structuring can help:

If it looks too simple, you can aim for some sort of middle ground.
But for a first BG this is very good!
I think the noise and dithering are working against the readability of the scene, esp. since this is low-res. The table almost disappears. A quick example how clearer light/shadow definitions and more simple structuring can help:

If it looks too simple, you can aim for some sort of middle ground.
But for a first BG this is very good!