This was an excellent bit of storytelling. From start to finish I could sit back and feel like I was drifting through the galaxy. Your usage of unique harmonic movements and empty space was a great choice for this submission as a whole. I think track 3 was probably my favorite, as I feel it best captures how I'd imagine how I'd feel from an emotional perspective.
My main piece of feedback I'd like to share is to be careful with how loud you record your piano, as there's a bit of clipping going on in the fourth track (0:47 was the instance I heard). Additionally, I think I would've preferred the first track to fade out a bit instead of cutting off early.
Thanks for sharing what you made, and keep up the good work :)