Tested on a GMA 950 MacBook (CX11.2, OS X 10.6.8). The game works very well, except for one notable issue - click targets don't seem to register correctly. Buttons within the in-game UI and on the menu and option screens act as if the there is a 10-20 pixel gap between where the mouse pointer is and where the game is actually registering mouseover and mouse click events.
This issue is relatively minor, and doesn't register the game unplayable; the cursor only needs to be positioned at around the top 1/3rd or so of a given button or click target to register correctly. The only problem is in some of the option screens which use sliders; the sliders don't work at all.
For this reason, I've deemed this game as Silver so far in CX11.2. Using Wineskin with Xquartz installed yielded no appreciable difference in this behaviour.