Nathan's revised the cores to be more solid and uniform between the horizontal and vertical stations. We've also changed it so the core will color cycle (provided it's being drawn by the ball).
I've revised the enemy missiles. Each level (kids, easy, etc) starts at a different speed, and they speed up as you progress through the sectors. Additionally, they don't turn as fast as before.
Cosmo mine explosions now take out enemy missiles.
For Harmony or Stella (requires Stella 5.0.0-pre8 or newer)
Please reference Rules of the Game for what's been implemented and what's to come.