I created a Web API to control your kitty from anywhere you want.
You only need a working Nybble with NyBoard and a Raspberry Pi mounted on top.
There is also a small sample web application included:
Details can be found here: https://github.com/leukipp/OpenCatWeb
If you have any questions about this, feel free to ask here.
With the Web API you can add much more features with very little effort.
There's more to come, stay tuned... ;)