I like your idea, I instantly thought of Rapunzles tower when I saw this but I lack the levels. Nice twist.

great idea author and very very nice blend

This is smart, but next time check the proportions, the ivy leaves have around the same size as the trees in the image, you can ifnd better stock of ivy on sxc.hu.
You also have some masking problems right in the center of the pic, that ivy square on the ladder. And blendding could be better, but you'll get it in time.

I just tell you that your image is nice... and that you created something with the source image. Good luck.

Interesting idea. Nice