There are things called conventions and good practices which provide programmers with better coding standards. You are not forced to follow them, but they exist for a reason, more so when you are programming something big, like a game.
The fact that he is not following even the basic ones (the code is not pythonic, procedural over OOP, lots and lots of goto statements in the form of Ren'Py jump, something that we avoid even in an old small language such as C) just shows that this is not "style", but rather lack of experience and knowledge.
Everyone should read this at least once when doing Python (although I follow this for pretty much any other OO language):
