Suggestions, eh?
First of all, the piano sounds really not realistic. Each note seems to have the same velocity as the another. You should try to alter them (but randomizing might not be enough, try to change the velocities knowingly so that you'll achieve the wanted effect). Also it's a bit too stiff for a piano performance. Getting some new vsti or soundfonts might be a good idea. Another thing, the song is piano-driven and yet it doesn't seem to go anywhere (although the ending is a nice change of mood) try to convey some emotions to your songs (especially if they are based on one instrument - they won't get boring). The percussion was creative, I liked it and there were some nice chord progressions and themes. Keep up the good work. 4/4 & 7/10