Crawle

[Sunlight]

Looks really cool, I like the realistic approach! I was experimenting myself with animal AI in game maker a while ago. I had the idea of giving the NPCs their own needs, meaning that as long as they could find their preferred food they would go straight for it at the smallest sign of hunger and be friendly to the player, but if they couldn't find any food and their hunger got low they would get agressive and attack you on sight..
Of course that's just an idea, you know if you want some inspiration for animal movement and behavior and such..