Looks good mate. The contrast works very well.

This style reminds me of Hero Core. =)

That logo represents part of my game, and there we can see last letters - F, F, E and E. Each letter has got continuation on the right side.

First F represents "paths". In my game you can see a lot of paths between planets.

Second F represents buildings - you can build and expand cities.

First E represents factories, which you can create army, weapons and food for people.

Second E represents weapon, which you can fight with enemies.

I think that should I change other lines, but I dont have any idea

Simple and quite efficient logo, B/W work well together. 
I really like the line with the buildings but it's difficult to understand what the other parts represent..?

 looks very cool for me!