I do not know if I can ask question here.

Is there something like a notebook pictures that has written a pixel development game idea?
I have seen pictures in the dev log occasionally.
I was interested in seeing them, and sometimes I got inspiration.

 

Oh right uh

https://www.cavestory.org/pixels-works/in-the-making.php

We have this page on the main site, which has the full development process for Guxt, as well as various notes and pictures for some of his other games. That's probably the largest collection available without doing a lot of digging around.