This Unity sample project uses hydna (www.hydna.com) to create a simple multiplayer demo which can be influenced from a html/javascript page chicken-god-web/index.html.
If you like you can replace the hydna domain used here with your own (change HYDNA_DOMAIN in Assets/ChickenGameController.cs). If you decide to use your own domain don't forget to also upload the behavior.js file in your hydna domain control panel.
You can create a free hydna domain at www.hydna.com
Open the Assets/ChickenHydnaDemo.unity file and build the project for MacOSX, Windows or linux.
Open the chicken-god-web/index.html file to see and control player states in the demo.
Then run your compiled app on your selected platform and have a friend or more do the same.
No animals were harmed in the making of this demo, but the animal assets can only be used to try out the demo project. If you want to use the animals in your own project they can be found in the unity asset store: