Comment 7 for bug 989035

@Mark Lassiter : I think you don't have the same issue. Our compiz is always quite high. Yours gets high only on wine closing and it stays at 100% (whereas we have only 10-15%). I think your problem is that wine does not properly quit after leaving the game. Have you tried to kill the processes of wine (wine.exe, winedevice, explorer.exe ?) after you son stopped playing ?
Otherwise, I would advise you to post a but report to wine website.

Guys, a workaround for that is of course to use Unity-2d... (but this is not great I know)