I hope you will see this message in time since this web forum doesn't notify the user when there
is a Visitor Message.

Sorry, I reached the quota of my PM yesterday and the time
I can send a PM again is after midnight around 2:00am in my region
where I have slept already.

You said "In principle you can", so I decided to start a thread first to
give a brief introduction and reply your questions later when I can send a PM again.
As mentioned before in my thread, I will send you the link
first and the content of mod seems too much to explain in a PM

The share of mod can wait, as I am still overhauling the story, and adding
mechanism by writing plugins(I just want to start a thread to gain some advice and it seems I failed to be patient),
I will also change sprites when I have time.

I prefer to send through private message, but this website is pretty old and lacks updates.
And I can't see the message I sent, therefore I have to leave the message here to public.