Thank you for answering me, to execute it is to enter the game and wait a little? If so, I entered, waited a few minutes and went to see my files and it didn't generate anything!
It is a bit slow to load but the game normally gives you a popup that says something like "move the assets file to /RenPy/...../". Note that the filepath seems to be different on older android versions, I would recommend to check the game update post which has info on this.
But the gist of it is that it creates empty folders that you then move the assets file to which is a separate download (both files are listed on the downloads page), and the game pretty much tells you where to move them.