I don't know if you're familiar with Zelda Classic, but it wouldn't be comparable to the 64KB ROM either way Zelda Classic is a very open ended game engine tha

I don't know if you're familiar with Zelda Classic, but it wouldn't be comparable to the 64KB ROM either way Zelda Classic is a very open ended game engine that happens to have Zelda 1 assets baked in I recall people making entire Metroidvanias with it