I wrote this for learning purposes. You can start a game with:
python kaese.py
It will open a window with a 10*10 grid with pre generated walls. The grid will change every time. To start a game with a different size you can add it as an argument like so:
python kaese.py 20
This will start a game with a 20x20 grid.
To play simply click on a not jet set wall and it will be drawn. If you didn't close a box it's the other players turn afterwards.