Hi,
I started the Asteris game over starting from a Metroid Fusion demo I wrote and replaced everything with some nice GPL graphics.
http://erana.yellowcouch.org/java/images/asteris-screenshot-2.png
There is a small room done, you can shoot and there are no enemies yet. The concept is also vague for me.
I put my GPL source code on http://erana.yellowcouch.org/java/ <-- Asteris entry