I really like your choice of genre and mood of music for this game. The melody and synths sound pretty cool and make a good match with the general aesthetic.
However, a 30 second gap between two songs feels too empty to me. Because the game has pretty much no ambient sounds (like the sound of engines when you fly) you just find yourself in complete silence and it breaks the flow a little. Also related to this, the in-game SFX sounds good but there is a really small amount of it. Like I mentioned before it could be the sound of engines or other sounds of the spaceship, maybe some cosmic ambient sound would suit it well too.
Anyways, it's still pretty good work, I like it