What you HAVE here is very good. It's got a nice beat, I like the main instrument, and the places you take it.
All it needs is some more love. A couple breaks with something different, and some more instrumentation to fill it out more. Some long strings and/or synths to tie it together and accentuate the chords a bit.
You could also take the drums slightly farther here and there. I like them as they are, but it'd make a sweet break to have them bust out with a slightly more complex rythm.
Having it clean and simple could work for some of it, but not for the whole song. As a whole, it just feels very empty compared to what it could be. Still, nice work, and very clean sounding. Do like. :)
I started this at like 3 in the moring xD - i was so tired but i couldn't sleep (had to be at the airport in 3 hours), and unfortunately was left unfinished.
This is the very basic version but yet again, i'll take what you said on board and hopefully pull it together ^^
Peace - EggZ