Looks good, but there are a few things you might want to fix on the back in my opinion, there is a small point in the bottom left and a bar on the bottom right and two more points along the bottom of the WSR part that should be touched over, the black WS text should have more white above it ,shrink it slightly and no first party Wii games have the Nintendo logo on the bottom of the spine. maybe also change the 12 sports on the front to 17, because that's how many there are with Wii Sports included.
But im not a official quality checker, just giving my opinion. Its still a grade A cover.