I'm digging the general color scheme and the idea of page curling, but I think that the dark streak's obfuscating the town a bit, and the colors need to blend into each other a bit because it seems just a bit patchy as is. For the corners, I think just adding a little bit of texture and fray on the edges should make things look a lot more realistic.
::Edit:: If you're using Photoshop, I'd recommend using a second layer, throw some gradients on it, so that the colors will blend together, then just shifting the transparency 'til it's at the right level. Maybe even try 2 or 3 layers of aging colors to blend the colors even more.
I'd love to show you what I mean myself, but I don't have Photoshop installed since my last hard drive crashed, and I have no idea where the disc got to.