This is a mildly entertaining applet I came up with while learning Java in the Programming Languages class. Nothing particularly advanced, just a simulation of various life-forms interacting on a grid. Check out the applet in action , and click on the source link on the bottom if you're interested in reading copious comments. This is an old project, done when I was learning JavaScript on my own. It's just the basic game where you get to turn over two cards at a time, and if they match, you take them off the board.
Detailed directions are in the game itself .