Compression
The piano sounds way over compressed. For some reason people around here have a lot of that. Use an eq and uncompress it you did. It sounds like the FL Keys or Md(?) piano plug in which has a compressed sound. I liked the melody after about the 1 minute mark. You hit it good at that mark. Keep it up. There's a lot of dissonance in the main part of the piano melody, and it takes me away out of the track when I hear it. Unless that's what you wanted, I'd change the chords or some keys in the chords or lower the sound level on the bottom end octave notes to mess it better. You might want to throw some more reverb and chorus in there and use stereo seperation. It would sound kick ass.