These are worms. Yeah. That's it. Press space to create a new one. Click to place food. If they are close enough, they'll go after it. They're quite entertaining. There is a limit of 20 worms and 20 food thingies. Of course, you have to realize that if there's 20 snakes, the program has to iterate through 1,020 items in a list, as well as check through the food list for each.
I'm bored, so I tried something. It failed miserably at what I intended it to do, but at least it produced this.