Man, that's impressive! I've seen the video when you posted it, but seeing this ingame is way more impressive for sure!

It is a pity that you didn't complete a game with it.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt