you just squashed the whole song into a limiter.
About sound is ok, but can't tell about the mixdown (well, these pianos are very loud in the mix as these are the ones smashing the song).
Try to get rid of every effect in the master bus =)
The deep bass is a little low, beats are definetly low, paino/synth and violin(s) are a little loud, although, you got a nice melody with them.
As Neomind says, the entire sound sounds compressed/limited. Not always the solution, but could definitely use only a little compared to what it seemed you used. The vocal was used a little much, cut down on that, and add a few effects in the track, its dry without them!
Nice on yah, and keep it up!
Steve (aka Dj Synergex)