i want to submit green mario 64, however the site page got shut down, is there any way to submit a game without this?
could i use anything else for this?

My advice for most games in general is to link to a page that describes the rom hack, but for this case I would suggest getting in touch with the sm64 Rom Hacks series moderators and asking them to add the board, as they are the ones responsible for adding new Super Mario 64 rom hack leaderboards to the site.