1. The only real things that are animated in this game are the player and the ball, and there's really not much more to it. The odds of you seeing any other major animations (like trees moving, flags waving, water moving, etc.) are slim to none, mainly due to the fact that the game is made via HD pictures.
2. A little WGT knowledge for you here... The "hit" zone is commonly referred to on here as the "ding," because of the sound it makes when you actually hit it. As for the jumpiness of the meter, it's not just you, and it's not due to your system. I've said this before, and I'll continue to say it: This game is running off of Adobe Flash Player, which is not meant to handle games of this magnitude. Until they upgrade to a more powerful program (which, let's face it... will NEVER happen), you're stuck with the jumpiness. As for now, try to play at times where the jumpiness will be limited (US night, after updates, in the mornings, etc.) in order to reduce to possibility that jumpiness will occur.
3. As for the camera freezing up... It's the same case as I said above, except it is occurring during your shot, instead of while you're trying to hit the ball.
-Will