The new scoring system would be a poor substitute for savefiles. It's not designed to hold unlimited data and you would need some way of making sure a data name was unique.

Rufpalidan wrote:

how do u vmake a game

Start by reading and learning this:
http://www.byond.com/docs/guide/

And practice using helpfull demos and libraries here:
http://www.byond.com/members/?command=search&type=resources