Hey Zem,

don't worry about not showing me sooner, i've been really busy so i probably wouldn't have been able to help you with it until now anyway. :P

ok well i'm not sure if you want me to comment on your wall here or on your actual wall page. so i'll just do it here :).
ok well first of all, that's a really nice vector. kudos on that. the shadows look great and i like the little roots you have on the chunk of earth. the little geese flying south for the winter are a nice touch too.
the overall concept of the wall is nice, but i think the trees should be more leafy instead of flowery, mostly because it's supposed to be an autumn piece for the challenge. so i think if you want to connect the image to the background more, the leaves/flowers that are on the trees now should be changed to leaves that a turning orange/red/yellow. you could even connect the wall together even more if you made the leaves on the tree the same as the leaves you used in the backgrounds (those maple leaf type leaves). also, it's fall, so the trees should be a little bare, since the leaves should be falling off now. since they should be falling, you could add a couple fallen on the grass too. i'm not sure if you're going for a more scenic look, but if you are, add in some light clouds - the kind you'd usually see during the fall- that blend in with the colours that you've used now. as for the picture, if it is a scenic picture, then i think the hues of the picture need to be a little orange, but just a hint of orange so that it'll go with the lighting of the rest of the wall. so maybe just overlaying some shade of orange on top of the picture will help it out.
i'm usually not a big fan of lens flares, but if that yellow ball to the left is the sun, then it works here.

ahh sorry to be so long-winded with this. i just want to try and help. feel free to send it on over to me if you make some adjustments to it. i'd love to see it :).

ok i think that's enough out of my for now.