Thank you for the comment! ^_^ Moving the text box to the middle is a great idea, but I'm not sure how to program it. I might come back to this game and do that if I ever get any better at programming. I didn't use a main character because I didn't feel like either Dylan or Sam should be "more important," so I tried to make them equally important by dividing the dialogue between the two of them. I left out any sort of narration for a similar reason; usually, I would include actions and inner thoughts, but for this particular story I didn't think that they would fit since I wouldn't have used them much anyway. I will definitely be including such things in my future projects, though. c: Thank you again! It means a lot that you took the time to play my game.
An easy way to have text use the whole screen is to use the NVL Mode, as explained here: https://www.renpy.org/doc/html/nvl_mode.html