

There's no shading since I have no experience shading at all and would rather not ruin it. It looks good, in my opinion, without shading. But, it still seems dull... So, maybe it needs shading. What should I do?
Also, are the squares too small to work with? doesn't seem like much shading can fit inside those bad boys.
Edit:
I decided to do the next step -- The walls.


Once again, no shading. The dullness is starting to be realize a bit more.
I thought the close similarity between the wall's color and the floor's color would make it be unidentifiable. But, it seems to work good enough.
Still, shading would make this this beautiful. Too bad I just simply have no clue how to go about it.
Next up, the rim/edges.