The horizon on the side walls needs to come towards the viewer more. Sofa needs a shadow. Why would the door change color above the horizon?

Thanks for the comments i knew the image wasn't right but couldn't put my finger on it. So thought i would post and see what what constructive comments i would received. Will look at your suggestions tomorrow and repost a revised version.

I like the way the door is painted to match the background. THAT'S why the door changes color!
A shadow underneath the chair, and a bit of toning down the shine on the top would improve this even more.
Well done, author.

OK, I guess I can go along with the paint job theory on the door, but the sofa needs to be reproportioned on the near end, and given a shadow.