It doesn't look post apocalyptic at all. It looks like a story about people in danger on a plane, or maybe a missing plane story at a stretch.
I'm not sure you have the means to do it, but I'd suggest a tighter focus. Angle the image so that you're looking up over the wing into a maximum of two or three windows. Show a horror-stricken face in one, and maybe a reflection of the post-apocalyptic landscape in the other. If you have access to clip art, you should be able to find something that works.
Regardless of if you want to do something like that or not, right now, it's a generic image. You need more "WOW."
Also, proportion-wise, your name is far too large. The title needs to be the biggest word on the cover, with your name significantly smaller.