Great feature - to build the blocks beneath the feets!
Disappointing that I hit the roof of the sky!, though! grin
Between 30 and 40 fps with almost all landscape in view. Runbs fluently on my old system: 3 GHz Pentium 4, Ati X300, 1Gb RAM.

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