Ragnarok90001: thanks a lot for taking the time to ask and read.
'Simply' showing the source code without saying what the terms are does not mean free, open source, even though intuitively it seems like it does. You would have to pick a license, for example one of the
FSF-approved licenses for code.
With the game relying on proprietary software, without free, open source alternatives (I assume this won't run on
EasyRPG?) the code is not free, open source software.
Thanks for making clear what the copyright status of the art is.
If you were to release the game script under a free content license, like for example
CC BY 3.0 Unportedl or
CC BY SA 3.0 Unported and if the writing does not contain trademarked content and if you made that content easily available (by providing a text of html file for example) then this way at least part of your game would be free, open source and might be useful for study, distribution, changing etc. If you have original scripts, original game design documents or original concept art, these would also be great to include.
TLDR: if you have 100% trademark-free writing, make it easy to access, license it under
this license and your project becomes relevant to these forums.
Thanks for bearing with me.

Pretty much the same rules would probably apply to Unity3D, UDK, Crysis and Flash games to be posted here on these forums.