I thought this issue would be Opera-related, as it does not occur in Chrome, Firefox, or Internet Explorer. (Which does not necessarily mean Opera is to blame for the issue.)
I haven't had good results (in terms of jumpy meter) trying to play this game in Opera, but that may be because Opera is my primary browser and I always have multiple Opera windows (and multiple tabs within those windows) open for work-related reasons, in various locations on the 2 monitors I use simultaneously. The golf game shouldn't be disturbed by any concurrently running browser windows, which is why I use Chrome for playing the game and for nothing else.