Well It's called "universal renpy mod" which is a small addon that you can add to any renpy game. With it you can cheat/modify many contents of the game. Like you can cheat money/items, you can change the name/relation etc of all characters, You can also edit the dialogues/text of every scenes while playing the game with a few clicks, it has so many more features like adding and replacing scenes which I don't know how to use..I notice on your screenshot, you got something on upper left corner on your screen. "Choices Detected" What are those things?
In short if you like Ren'py engine games, this will change your life..