Just wondering are you planning on it being a zombie game or human/alien game? Ill post mine in a bit, its fighting humans
First try at this... normally i do zombies as they are easy...
Stuff + Other Stuff + Different Other Stuff = Things :)
My best Alice game:
Clash of the Cubes (an arena fighting game):
http://www.alice.org/community/showthread.php?t=10738&highlight=game