Absolutely gorgeous. Parts of it remind me of the Tristram theme from Diablo, which is one of my favorite pieces of video game music.
I think it would be cool if you experimented with delay effects on this. You could also master the track to bring the overall volume up without losing the dynamic range. You have a decent amount of headroom leftover in the waveform. You could also let the final chord ring out longer, since it cuts off a little abruptly.