For the demo the graphics are from regular cavestory except some npc's the mychar.pbm the faces and the weapons. ps i always uncheck read only and check remove pixel requirement but still wont work.
For the demo the first map is pretty much the same because whenever I try to edit the actual level (not script) it just says error in saving map. but in the full game there will be custom levels (because I'll pretty much start from scratch) and 3 or 4 levels that are the same.
Would it be possible to re-unzip or re-download the file I sent you and test that one? It really does seem to be fine on my computer. Also maybe check the image file (I dunno)