Simple Minecraft-inspired demo written in Python and Pyglet.
http://www.youtube.com/watch?v=kC3lwK631X8
pip install pyglet
git clone https://github.com/fogleman/Minecraft.git
cd Minecraft
python main.py
On Mac OS X, you may have an issue with running Pyglet in 64-bit mode. Try this...
arch -i386 python main.py