Since Arc is a language targeted for the web... have you considered the possibility of generating a web page for it, with maybe next >> and << prev links?
That might actually work, and just autorefresh the page every second or so :)
First priorities now are finishing the wandering algorithm for the animals so that they're no longer steered but steer themselves, and generalize the code I've some more so that adding more behaviours than just biting things is easy. I'll add the visuals-through webpage idea to that list :)
