Impressive Game Boy hack at work. What made you want to hack its GB port and not the NES original? I heard mostly bad things with that port from people who had it on NES. If anything, it blows my mind that no one has tried sooner to turn Battle of Olympus into a full fledged Zelda game like you are doing now.Those complaints are mostly because Zelda II is completely different from the first one. Zelda II is far from a bad game but isn't perfect, but is still fun to play. Those who say that the game is bad clearly haven't played the whole NES library as there are quite a lot of stinkers even with Nintendo's quality control and restrictions.