Hello, welcome. :)
So this is your first submission... is it your first song, too? Because this isn't bad for someone as early on as you are. (Well, it was better than my first song. :P)
Your melodies are nice, I have to say. Creative. And you keep things fresh and new throughout the song, which is great. Now, the problem here is that you're lacking rhythmwise. I hear mostly eighth notes and quarter notes - there's little variety. The notes are great, but rhythm can make it even better - so try for the same quality there next time. ;)
Harmonies, harmonies... well, there are a lot of them, which is good - when I review newcomers to making music I often find too few! So you know your stuff. ;) Now, what we have here is what almost seems to be too many harmonies! They clutter the quality and make it a bit fuzzy, unfortunately. Actually, it's your choice in synths as well that brings the quality down. For example, the one that plays that five-note eighth-note riff is a bit too... airy, if you know what I mean, for the sake of the sound quality. Now, there are a few things you can do for next time. What program do you use for your music? FL Studio? Sounds like it... well, tweaking with the individual volumes of the synths and sounds can help, if you didn't know that already. And if you did... well, keep trying! :D
Your drums seem a bit plain. Samplewise, you seem to have used raw ones, without FX'ing them or anything. A bit unoriginal, and, thing is, there's not much I can do to help you here. :\ Keep looking for better samples, experiment with FX, hopefully you'll get somewhere. Oh - if you use FL, do you know how the Fruity Slicer works? I'm not going to bother explaining here in case you don't use FL, but you can PM me asking for an explanation - the Fruity Slicer really helps with your drums, provided some good drum loops. Now, samples aside... your drum rhythms aren't too bad. You're trying to be a bit creative with the hihats and snares, I can see... :P It works, but later in the song the snare becomes hard to hear - try lowering the volumes of some of the synths and slightly raising the volume of the snare until you think it works.
Now, what I really like about this song is that, other than the drums - those samples really can't do much, unfortunately - everything contributes towards the same feeling. Again, you're no beginner at this, it seems. It's an important point that you nailed, great job. :D
Whew, long review! PM me or tell me in a response to this review if you have any questions. Hope I've helped. :) Keep up the good work.