Usually it’s the little things we don’t even think about. Geometrically… which is a strange word to use, the scene is okay. You have some nice detail in the furniture and rails, which might be too contrasting to the door texture on rather plain geometry.
I think it is the space in the front which poses the bigger problem - there are some details missing in general: like any noticeable texture on the left wall or a logical source for ivy. Like the brick wall at the base of the background wall. Speaking of the background, the mirror gives off some surrealism - what I said about imperfections, you need it here. That mirror is simply too reflective, it’s almost like there’s another room there. You might do well with more geometry in the scene. You could also add a sky texture to the background. some clouds on an evening sky and make sure the sun is in the proper place on that one.
Personally I find the lighting a bit off. For instance, try tungsten color temperature for the lamp (3200K) in stead of white, and something equal or even hotter for the candle. The top is a bit too…blue, too deep or saturated for my tastes. there’s a lighter streak across the roof too, which has no logical or defined source so that’s strange. You would not believe how much details like these can do for a scene. Talk about subliminal messaging.