I have heard your story via the game description, and I empathize with your situation.
Godot has been a wondrous thing to learn, and even though things didn't work out this time, your mentorship may still be of value. Asymmetrical workflow will allow you to solve your problems. Github and Trello are tools you can use to achieve this.
That said, it is a sad time that you aren't able to assist your partner directly.