By Mari0, I mean this slice-of-genius Mario / Portal mashup.

sudo add-apt-repository ppa:bartbes/love-unstable
sudo apt-get update
sudo apt-get install love-unstable
mkdir mari0 && cd mari0
wget http://stabyourself.net/dl.php?file=mari0-1006/mari0-linux.zip && unzip mari0-linux.zip
love-unstable mari0_1.6.love

Piece of cake.