I think you can consider adding other elements to the game (more chaos on the track) so that it better fits the theme. Also the ship is a little hard to control because the track is too narrow (or I just suck at racing game...). I think making the track wider + more "out of control" element could make this game a lot better!
In terms of design and visual, I love it a lot. Very simple yet very elegant and stylist like. You did a pretty good job on your design, Good job!