A PCE port of this game would be cool as I never beat it. Everything was too samey looking and I got frustrated with it. I was thinking that Metroid 2 was one of the games that had enhanced color when used on the gameboy color but I was wrong. I did find this interesting piece of info on the wiki though.
"Nintendo R&D1 was also involved in developing the Game Boy Color, an upgrade to the original Game Boy with a color screen. Nintendo of America's Dan Owsen noted that Nintendo R&D1 included a special "Metroid palette" in the Game Boy Color's hardware, which "makes Metroid II look really, really nice on Game Boy Color", remarking that this made the game's graphics comparable to the original Metroid on the Nintendo Entertainment System"