Works like a charm!Though if implementing it in your game I would add a quick pixel_width() to to the input. Just to avoid saves called "WWWWWWWWWWWW" breaking the UI.
in the screen savegameName(accept=NullAction()):
this line
input size 40 color gui.hover_color default store.save_name changed Namer length 22 allow allowedChars:
limits the input length to 22 characters (adjust as required for your use)