Did you try installing cutemupen from here
and what have you done, efforts-wise, in terms of trying things out?
But if you want to try something, which seems a little hard at first, simply run
and install mupen64plus from the repos.
sudo apt-get install mupen64plus
Then run mupen64plus -h
to get an overview of the commands to run games.
Basically though, the common command would be like any other command to run something.