Metroid 2 is a fantastic game for the Game Boy. It's full of atmosphere, eerie music, hostile as fuck Metroids, and the kind of very satisfying progression I've grown used to with the previous Metroid. The only problem I see with the game is the lack of a map system can make it frustrating to nevigate. But there's a reason why this game has a dozen fan remakes. It's a pretty stellar Metroid game. Definitely worth the little time it takes on NSO.