As its name suggests, Zelda: Remastered is a community-made Mesen HD pack for the original Legend of Zelda game released in 1986/1987 which kicked off the series. Mesen HD packs are a feature in Mesen, a NES emulator with a SNES emulator sibling called Mesen-S, that allow modders to conveniently create high definition packs for NES games by replacing their graphics & audio files with higher quality ones.
Going back to Zelda: Remastered, this Mesen HD pack with Aclectico at the helm and numerous other contributors including KYA, Sour, ShadowOne333, Snarfblam, Pepeztyle, MadBatter, Altar, ADilla, Farian, Arne, Fool & ChaosMiles07 comes with a wide array of improvements including:

https://wololo.net/2020/10/14/emulat...-best-results/