Hello! I am back, I’ve seen you run into a problem with lighting, and to be honest, it sucks because all of them have to be rendered directly when you are in the game(Can’t be baked like most game engines).
But, I’ve recently stumbled upon a page of an add-on or some sort for baking lights, though I’ve never used it, I hope it can help you fix the lighting problem @Akeryiu pointed out.