Would it be okay to use Game-Editor's source code

[Myst]

#1: For editing to add new features

#2: To be editted in Notepad++ for adding new features after the Notepad++ document gets saved

#3: To learn coding

[MrJolteon]

Absolutely. It's an open-source program after all.
Though if I were you, I'd use a proper IDE, such as Visual Studio, instead of Notepad++.

[Ehman]

I just got a new link where the source code may be downloaded
https://sourceforge.net/p/game-editor/code/