Well, about music: This music is AWESOME but I don't see (or hear) it in racing game, more shot-em-up like games
(this one made me want to make one: http://soundcloud.com/covox/sulumi-c...remix-by-covox)
Xpand: I like the direction this track is goingKeep it up!
As for barrel rolls in SSGX... wow, this one is nice piece of nut to crunch xd And sound effects are hard to implement too when you want to avoid some things... oh, and I'll have to add 8x2 rays to ships what will decrease game's performance a bit.
btw. (still I don't know how much room I have for improvements in my source code as I don't have this Unity-Pro "Profiler" which shows what (and how much) takes PC's power so you can ignore message below if you want as it's a little harsh)
Low-end PC users: I'm sorry but I won't cut game features just to keep it playable on slower computers because I want to make this game good and stable just so players have a nice time playing it... I wonder if there is a developer in the world who won't meet his dreams just because there are (sorry for formulation) "exceptions" on this planet who'll want to play his game too. What worse even if he do cut them it won't get to larger part of players because many of them want to get to higher level with their machines, what follows is decreasing number of low-end PC users. Just my opinion, nothing to offense others.... said too hard? Sorry again