I think it sounded a little “thin” at times like just 2 or 3 instruments. Maybe
it could be an idea to “fatten” it up with a soft, sweeeeet synth pad (maybe
even with a sweeping filter with LFO set to 0.5 or 1 pattern length). The pad
just “holds” chords or part of the harmony.
I really like how you made it sound as if the synth (arp?) was like “above”
the piano, though it wasnt tonally. You can hear the piano perfectly.
I must say first that Trance is not my favorite dish, but I do like those “pure”
melodies. And I thought yours was really good in that apartment and Im
looking forward to you next song, as you get more technical.