This is the closest thing to an official thread that I could find for this game, so I'm giving it a bit of a bump.
My DVD copy of the PC version of SBCG4AP arrived today. This official Telltale Games picture shows what the case looks like:
After popping the game open and checking out the manual, I noticed an odd bit of color peeking through the holes by the little, clippy manual tabs. Reversible cover, you say?
Indeed.
Sure, the recent Venture Bros. DVD set makes this a bit of an old gag, but who cares? Atari 2600 homage!