Wow this is really interesting! It has great bones and moves in really unexpected ways that made it enjoyable for me. At times it feels a little naked, which isn't necessarily bad, but it could be more intentional. Maybe thickening up the orchestration in some places could help.

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. 

Your instrumentation does a very nice job evoking a space-like twinkly star environment. I really enjoyed the middle section most with the high mallets/celeste. The French horn is a nice contrast to this texture and also has an adventurous connotation to it that also helps identify the space theme. I noticed there was a lot of motion in this track and I wonder if slowing it down a little would help with the weightless feeling of space? Good work on this and thank you for sharing!

Scoring sheet music is beyond me, respect. Keep it up man

https://musescore.com/user/103927741/scores/29009186