There is a godot addon called
Orchestrator
I don't know how good it works with 2d but it might be worth giving a try.
https://godotengine.org/asset-library/asset/3209
On the other hand, there are some 2d game engines that have visual scripting built in, such as:
- Construct (PAID) construct.net
- GDevelop (PAID) gdevelop.io
- Gamemaker (PAID) gamemaker.io
- Clickteam Fusion (PAID) clickteam.com/clickteam-fusion-2-5
There is also a free one:
- CTJS (FREE) ctjs.rocks
I recommend that you check monetization for these engines (if your game is original and you want it to be paid or something like that.)
Fnaf: into the pit is a high scope game, meaning that you are likely to give up before getting close to finishing it.
I suggest you make a bunch of small game first (Yes, I know it sounds awful, but many people have quit game dev for trying to make some big games, stuff like Minecraft, FNAF: SB, Binding of Isaac, Stardew Valley, and even stuff like a 2d puzzle game with roaming characters and a bunch of content) so if you haven't already, I suggest you do so. Even stuff like a fnaf 1 remake works.