A decent melody.
The melody was decent. Sounded a bit awkward here and there, but overall, I'd say it flowed on without any problems.
What I would suggest you is to add more instruments, effects to add up on the diversity. This song as it is in it's current state feels a bit too empty. Maybe make a transition from one instrument to another, and then add some more background pads. Some simple and clean percussions wouldn't hurt either. If possible, also try morphing all the instruments. I've noticed that makes a major difference.
There's always room for improvements. Keep on, my dear music producing fellow.