Held up better than I expected for an early Game Boy game. Definitely holds up more than the original Metroid 1 on NES. Controls decently most of the time, although I was never able to get used to the timing of the Space Jump which can be annoying in the numerous areas where you need to go to the top of a giant pit, and if you mess up your timing you'll fall all the way down to the bottom. Other than that I had a pretty good time! The atmosphere this game is able to summon is very impressive, it feels quite spooky and it can be pretty scary when a Metroid shows up suddenly and breaks the silence, which this game uses very well. It has a similar issue with Metroid 1 where it frequently and noticeable reuses chunks of level, but it's less of a problem in this game due to the linear structure preventing you from getting lost as easily. I still might recommend keeping a map handy though, since it can be easy to forget or lose track of where you've been and where you might need to go. Still, I'm glad I tried it out, it's a cool little piece of the Metroid franchise that often gets skipped despite how vital it is to the overall story. I'll be interested to compare it with the 2 remakes once I replay them.