Maybe try hitting escape and x at the same time, then type tetris. Unless emacs doesn't work for you. I've found some other neat ones too. Type pong or snake in the place of tetris and you'll get those games. You can also see star wars IV (Yes, the whole movie) in text (Like pictures made of dots and dashes. I know there's a word for that, but I don't know what)
Just open terminal and paste "telnet towel.blinkenlights.nl " without the quotes.