I was looking at the credits art in the Cave Story base folder, and I noticed that all the art files are numbered, however there is no number 13; it goes from 12 to 14.
Was this a mistake or is there a missing piece of credits art?
If you get to the place in sand zone with a heck-ton of birds and fall down, there is a single block you can walk through that goes nowhere, does anyone know why this is here?