Please offer only constructive criticism. The intent of the GD Showcase is to help the developer create the best game they possibly can. Show them you support their efforts when posting.
My starfields seem to look like minefields than anything else, hehe, I think it might be because I went gung-ho on the magnitude. I'd suggest a graphical Winform interface, just because console apps make me involuntarily shiver. :P
If you went the Winform route, a quick-preview feature would be really cool; giving you a general idea of what the starfield will look like. Maybe a button to generate a starfield from randomly-set values to avoid the tedium of picking numbers off the top of my (uncreative) head.
All in all a cool little program. I'm a sucker for additive blending. :D