http://mokeron.hp.infoseek.co.jp/zg/fraxy_main.html
Site's in Japanese, but hopefully you can find the link. the game can be run in English. So, this game amounts to a "make your space shooter boss" editor. There are some pretty crazy things you can do. I've begun work on things lately.
Starting Up:
The game, like all great things, has it's own Wiki here:
http://fraxy.kafuka.org/wiki/Main_Page
And it's got it's own forum here:
http://fraxy.hqforums.com/
And that's about it for starters. Those two sites should sum everything up easily. mainly the first.