Yo dude! You used LMMS! Respect. I use to use it, but have moved onto Ableton Live. Anyway, you have something special here. I love the high tones, they make is sound so open and spacy. Great job. Really good composition here. Just you might want to watch out for dynamics. Adding some dynamics will really add a lot of depth to your song. (This is something I struggle with myself) I like the horns too! Great mix of instruments. It certainly has a good space feel about it.