What are you trying to make? I’m not aware of anything open source.
I think short of using rpgmaker (not open source) or something like it (that makes a very specific kind of game and you are really just plugging in content) you aren’t going to get very far into game development with no coding at all.
Unity (again not open source) allows you to do a lot without coding, but by the time you learn how to use Unity you may as well follow their provided education/classes and learn to code while you’re at it.