This game's control is equal to the programming behind it. There is no logic to either. Sometimes the "swing bar" moves at a turtles pace, others it is at light speed, and about every 3rd shot it doesn't know which speed it is because it goes slow then when it really counts its jumps up (using the same club). Then there is the swing pull, which doesn't seem to make any difference to your swing at all; you can put it to full power or 3/4 power and you will still get a full swing if you hit the mark perfectly. This brings us to the most annoying part of it all. There's a HUGE gap of blue, where the speed likes to vary, in which you must hit the mouse at the exact nanosecond before it hits the middle line so that the bar stops on it or your shot is completely screwed. The area is supposed to represent the slice or hook of your shot, but it does so much more. If you miss it by 1/8 an inch then you can expect your shot to be 5-8 yards short, miss it by 1/4 inch and your shot will go approximately 1/3 of the distance it should. Now, I am not a gold pro, but I have never seen a hook nor slice produce 1/3 of full swing distance. EVER! I have seen them take the ball 90 yards off course before, but never saw one send the ball into the ground the way this game displays.
Basically I am saying "This needs to be fixed if you want fame for this game."
The way the controls work, as it is, will kill it. You either need to fix the speed issue or reduce the constraints your mathematics are placing on the targeting. Right now the only people who will continue playing this game for more than a couple months will be the people programming it and whatever geeks that are kissing their rear ends in hopes of some scrap-dropping. The average person has a 0.1 reflex rate, and your game is requiring 0.001 ( not to mention possible web issues. Net speed varies from isp to isp and from household to household. You need to think about that when you design a web based game.) I would suggest, rather than trying to fix your speed issue, you widen the target beyond the 2 pixel slot you have assigned to it.
Of course, the virtual golf pro geeks will be getting well under par every round if you do that.... Oh wait.... They already do that, so you're not going to effect their game at all. All you would be doing is improving the experience of the average player. Maybe you don't want to do that, though.