Playing the Game Boy version of Tetris for the first time really shows what an iterative process this game has had. People will often say that Tetris is a perfect puzzle game, but I don't think it actually started out that way. For Tetris to be considered great, it needs great controls. The Game Boy version is pretty rough in that regard, with pieces often feeling like they got caught or stuck in a way that simply does not happen in any of the more recent titles. The NES version holds up better than this. Still a fun enough time that I cracked a 6-figure score (ended on level 11 I think), but with so many versions of Tetris out there, this isn't the one that anyone should put their time into.