CB has a demo version, so you can probably use it to see some technical points, if there is a strong interest in them.
As for the loading option, I hope it does not cause any errors related to all sorts of mechanics in the game (relationships, inventory, stats, crafting). I don't know how Ren'Py works, but I accept the possibility that loading not from the main menu may cause errors, like duplicating or something more serious. I can't remember where I've encountered this kind of thing - in Ren'Py, RPG Maker or some other games - it definitely happened, but I can't say where or when.