Hey, just did a run of this game.

May I recommend making two subcategories, one for NES, and one for the computer versions of the game? They were released a couple years apart, so they play a little different from one another.

Also, the platforms would be better off as NES, MS-DOS, Apple II, and Commodore 64, as those were the platforms they were released for. I assume the current run up is an MS-DOS emulator; there's a way to mark this.

Cover art for the game can be found here: http://www.mobygames.com/game/classic-concentration/cover-art

Just some suggestions.