How to play snake in terminal?

Today I caught a teacher playing snake at his tty console. I know that he has Ubuntu. How does he made?

I tried to play myself in my treminal by typing snake and it told me:

The program 'snake' is currently not installed. You can install it by typing:
sudo apt-get install bsdgames

So, I installed bsdgames and then I started snake. But is not exactly what I expected. Is different from what I saw (a long, green snake). Any other idea?

Why don't you ask your teacher?!? Maybe you are interested in nsnake. To install it, run the following command in terminal:

sudo apt-get install nsnake

After is installed, you can start to play using:

nsnake

^{(Source of the image: http://alexdantas.net/nsnake-screenshot.png)}