- thrust exhaust now visible
- asteroid speed slowed down a little bit. It was originally 3->9 (in steps of .4) and was changed to 5->11. After watching keilbaca play, I decided to split the difference and it's now 4->10.
- sound effects are now quieter in demo mode
- UFO now targets asteroids when it's not targeting a player
- respawn no longer occurs when UFO is onscreen
- asteroids now start at edges of the screen
ROMs for Harmony or Stella 3.7.1 or later