I love this, it sounds really professional and definitely belongs in a video game. I absolutely love the part from 0:25 to 0:50, the atmosphere you've created sounds incredible. This flows really well, and I can't really hear any flaws in it.
Also, something about this makes me think of a level in sonic game (which if I recall correctly takes place in space). I think it's that lead you used. I love it, and and because of my previous statement, it kind of brings a nostalgic feel. I can't even explain why.
Anyway, awesome song. Can't wait for the full version!