This game just reeks polish. Detailed race-track, good menu system (heck, there are even links to all the artists), surprisingly well-done camera with tilt/motion blur (if a little bit too much tilt; and the little "intro" to the track, that's great).
It's pretty fun soaring around-- it feels like the grapple in Xonotic, somewhat. Really, really solid base you have here! With just a bit of tinkering, this'd be excellent. (And judging by a greyed out "multiplayer," you have some cool ambitions, I look forward to it. Or maybe that's just a placeholder, haha)