I think you had a good idea here, but to me this shot just doesn't work. Perhaps as people have said below, the window is too dominant, which completely overshadows the elements of the photograph outside. The exposure on some of the spots on the outside is also overblown, especially underneath the tree on the left hand side of the photo.
The grame in this window is overbearing and really steals from the composition. Nice lighting, exposure and crisp focus, but perhaps a different window would have been nicer.
The arch window is an interesting choice to use for framing, but in this photo it really isn't framing the subject very well. In fact it's doing more to obscure it than frame it. Moving a bit to your right would of positioned the house nicely in that right pie poriton of the arch.