Hi Mike,
check you're email, maybe you would like to test the release version??
A lot of attention went into point 4. All graphics were designed with the least amount of points and a sorting algorithm is implemented to optimize the blanking distance between on-screen elements. The game runs between 24-30kpps on 30k scanners. In two player mode when a lot of stuff is on screen: more bullets, explosions and asteroids, the speed needs to be 28k5 or higher but graphics still look fine.
cheers, Z.