Please give us some more details of the rejection given. Was it technical, was it a copyright problem or poorly designed?
Over all you may have some interesting concepts but they look a bit rough. The designs are a bit weak. Maybe "clean" them up a bit? Otherwise I'm not sure what the rejection was since you really didn't divulge on details on the rejection.
Might wanna look at what's being offered for download already here. Competition is tough. So yeah clean up that design. 🙂