Hi, guys! I'm composing space music with piano as a lead instrument. I really want to know does it sound like a space music. I was concentrating on emptiness, vastness and calm of cosmos and tried to express it in music. I was inspired by Kubrick's 2001: A Space Odyssey as well. 

It does have a space feeling, but it's so warm and calm. The music should fit the theme and style of the game itself so it's hard to judge because the cosmos can be used for anything. A game about war in space might leech from that fact that the cosmos is also cold and hostile to human life to feel more aggressiveness and action. Your songs could fit well if the game was harvest moon in space.