Make sure that the driver to your 3D graphic card is proper installed and working.
Next you need is to install 32-bit libs to make Soulfu working;
Code:
sudo aptitude update && sudo aptitude safe-upgrade sudo aptitude install ia32-libs libsdl-net1.2 wget http://www.boundlesssupremacy.com/Cappy/getlibs/getlibs-all.deb sudo dpkg -i getlibs-all.deb getlibs -l libvorbis.so.0 libvorbisfile.so.3 libogg.so.0
Done.
You can now launch Soulfu by Applications tab —> Games —> Soulfu
Or by typing SoulFu.sh in the terminal.
Enjoy!