A bit too plain at first, but still a great piece.

At parts with only one instrument, it doesn't sound great. I also think you could add much more, considering how nice it was in the original. It only gives a faint recognition of the original, and that's because I have traveled between Ludi and Orbis many times in the early parts of the game (2006-2007).
For compliments, some parts were really great. I'm giving it a 7/10. I think you should pursue techno remixes, but try to make it all hardcore, with about 10 instruments. I'm sure it will turn out great.