I like the combination of shadow and shader as it can be seen in the pics.

Where did you make the shadowmap?
On the terrain it is brighter near the edges of the boxes, what is a bit irritating.

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