tinyE: I always considered games like Goblins and VVVVVV to be that way. Those are ones I pop in and play for a second or two when I'm tired or doing something else or just trying to kill a few minutes. The way I see it, GOG
does carry casual games.
WBGhiro: Well, I wanted to add that they're usually easy enough so that even your mom can still play them, but I was afraid were you would take the argument as soon as I mentioned her ;D
Actually, that's a fair argument, in that I get where you are coming from and understand the point. Yeah, the games I mentioned aren't on the easy side, but then neither is Minesweeper and when I googled "Casual Games" that was one of the first that came up. Ditto for Spider Solitaire and FreeCell. I'm not trying to be difficult or a pain in the ass I just don't know if the OP makes a convincing argument that GOG needs to get something when in many regards it already has that something.
I will say I wouldn't turn my nose up at Bejeweled, Peggle, or Luxor but there are so many free clones of those games out there already I don't see the need to bring them here.