Yesterday, I was having a really great CTTH round, when I decided to click the "leaderboard" link under the MENU button. I should have known better, because what happened has happened to me a few times in the past... the screen dimmed immediately after clicking the leaderboard link and froze.
After the screen "dimmed", all the "graphic overlays" like the swing meter, the aiming tool, menu, wind direction, and small hole representation were gone, essentially making it impossible to continue the round. Some of you may have had this same problem and may have been forced to close out that round, possibly losing a good one. But next time it happens, try what I did...
Determined to not lose my round, I searched around the screen with the mouse pointer until I found a "clickable hand" that appeared. There are several. These appear even though there are no visible buttons or text.
In the lower-right area of the game window, I found one of the "hands" and clicked it.
VOILA! The screen brightened, and the graphic overlays returned! I was able to finish my round (which turned completely to disaster on the next hole, when I hit the ball into a bunker... lol!)
There are a couple other "hands" in that area... search around with your mouse's pointer, and click them until one works.
I submitted an "in game" bug report, so maybe the problem is being addressed. But if you experience this glitch, try the workaround. It works.
I wish I would've taken screen-shots... maybe it'll happen again, in which case I'll get some and will edit the thread.
Good Luck. :^)