There are some gameplay videos on youtube, but I agree, it just seems like common sense to include more information here, if you want to make sales.
I can't even find youtube videos on it, have you got a link to one? I'd like to support John Riggs and collect CIB GBA, but I also am on the fence, seems there is a reason all gameplay footage is hidden.
Well, when I said "videos," I guess I actually just meant "video." But there is a longplay, at least:
Ah thank you @happydeathman.