Map + gfx:
http://www9.rapidupload.com/d.php?file=dl&filepath=8618

Its just a sketch of the idea.

Screenshot:
http://sv1.randomcrap.net/uploads/files/0/laputa.jpg

Interesting. I don't like how the castle scenery sprite just cuts itself off like that at the end; you should make a second castle sprite for the end.