Can you explain more about any error messages or what precisely is wrong?
Also, these two lines don't seem to make sense:
guyOne .current_character
guyTwo .current_character
First, you are changing scenes, so I'm not sure that code will run at all. Second, it is not an assignment or method call. So even if you moved those two lines above the change scene, they would not do anything. If would be like writing the following code:
if Input.is_action_pressed("ui_select"):
57
In terms of syntax, it is valid in the programming language, but writing "57" on a line by itself would not do anything to have any result.