Diamond, thanks for the welcome and the suggestions. The floating land issue is something I hadn't thought about. I'll see what I can do to fix that.

As far as the crammed issue goes, how would you suggest moving around the land shapes without having to go back serval steps and redo things? I'm new to using gimp so I'm not very adept at fixing something like that without pretty much starting over or making a total mess of all the layers and layer masks and such.