Well, I've used some models, textures and animations. All code and prefabs / scenes are freshly made by myself.
I've had the habit of taking 3rd party assets and structuring them the same way I structure my own assets, which is what I've done here and what I meant by 'heavily entangled'. It might be a bit of an overstatement.
With my newfound knowledge of the EULA, I will change this habit to have a directory in my project that is to contain all 3rd party assets and have the path to this directory in my .gitignore