I'm still trying to get my standing targets dialed in. I did some leaf switch adjustments yesterday, but still think I need to work on them. One thing that would help to know -- should you get the nice sounding beep sounds every time you hit the circle or square standing targets (or does it depend where you are in the game as to whether you'll get points and/or sounds?).
It seems I'll get sounds occasionally from various circle targets, and almost never from the square red reactor targets. When I don't get the nice bleep sound, I sometimes think I hear a small more faint sound, but nothing overly audible. When I do the switch testing rolling a ball into the targets, they do register.