"Creatures" is the early stage of my biomorphs project. So far I have a class of bacteria like creatures that can swim freely and follow the mouse pointer wherever it goes. You can increase or decrease their metabolic rate so that they dart about farther from home and more randomly.

The next stage will be to add more advanced properties and abilities, like collision detection, a simple smell-like sense, and predation of one type on others. I'm providing the source code, and a compiled Shoes creatures.shy file which should just run if you have Ruby/Shoes installed.Please note that this is just a static screenshot and doesn't run. To make it work you need to download and install from the previous page and then the file creatures.shy from this page. I hope to learn how to make it run in situ soon.