As an overall idea, this sounds terrific! Seriously, this sounds amazing for a bare-bones MIDI file. I'd really like to see how you could fully flesh something like this out with next level software. I just recently got FL studio 11 and fell in love. Seriously, I was reluctant to buy it for 100 bucks but totally worth it. I mean, a lot of the plugins cost a heavy amount but there are soooo many free ones as well.
As for the song, itself, I think it sounds very good, particularly for your first submission. There are a few parts where I can hear some dissonance but I think it actually adds to the overall feel of the piece. And it really screams Final Fantasy to me for some reason. I'm not sure what else to say but I'm looking forward to hearing the finished version of this, and what you produce in the future. Nice Job!