A bit slow but meh.
I thought it was a bit too slow... I mean, if it were up to me, I'd have made a more trance-like and upbeat song. That would've been a nice remix. I just don't feel comfortable with the melody being so soft... but since it says, "Gerudo Valley Death Song", I'll treat it and review it as a pessimistic, sad song.
In that context, I think you did a nice job. The softer melody fits for a sad song, and it's an interesting listen. Surprisingly, the piano piece didn't get very repetitive (which I thought it would after the first few seconds). I think you could've added a few more instruments, but all in all, I think you did a pretty good job.
I'd love to see more. :)