not bad...
It's not bad... though I'll be honest, to me it sounds a bit empty. It really does sound a lot like the song, and total kudos for that, but perhaps fill it in a bit with more (or any) full chords if possible, see how it sounds. Don't forget, when this song was created, it was in cheap-sounding 8-bit (or was it 16 or 32 bit? I can never remember). You as an artist are not limited to that :)