hmm
well this song is really awesome everything goes together well I'm surprised you were able to work together with your sister unless she's really cool. But it's very good I wouldn't put this under metal maybe rock not sure what type it goes under but I don't think it's metal. The piano part was good it was really weird though because it sounds blues not metal I don't know if you ever listened to nine inch nails but some of there songs has piano and maybe that piano style would sound better in this kind of music the song is just like you imagined listen to it and maybe consider using that type of piano for the song
some advice turn up the bass I couldn't hear it I hate it when songs don't have loud enuff bass anyway keep making music.