A smart bloke nicknamed ‘Knightmare‘ is making a port of Zelda: Ocarina of Time using Gameboy-looking sprites. The demo was made available last week for download. It contains all of Kokiri Forest, Lost Woods and Deku Tree Dungeon, including all enemies, items, Gohma, etc.
It says that you can play up until you get the Kokiri Emerald but cannot enter Hyrule Field.
Anyway, for your info, this claimed to be a remake of Ocarina of Time for N64 with Gameboy-like graphics and gameplay as well.
He also says that when it’s done with finally it will have almost everything that was in original OoT, although ‘some things will have to change in the transition between 3D to 2D’