Decent, loaded with potential
Seven may seem like a low score, but I feel that you could really do so much more. I love your music, but quite frankly, your piano arrangement skills could use a bit of polish.
The theme you presented is haunting and sorrowful, yet with hints of hope in a few select major chords. The progression isn't cliché, and the melody is lovely. In other words, the song has potential. If you wish to improve your skills at composing for piano, you have to understand how a real pianist performs. WritersBlock has pretty much summed up everything I have to say, but I will reiterate.
This would sound much more organic if you focused on dynamic contrast and tempo changes. Unless interpreting this as a baroque piece, (which it most certainly is not!) no decent pianist would play this so mechanically. There are a few subtle dynamic changes such as at the beginning, but I would like to hear even more contrast. The forte section is very mechanical and dynamically stagnant. Tweak the volume of each note as if a pianist were pouring out his soul! This could be so much more mournful and emotionally driven with a little adjustment in this department! Equally important is tempo changes. Increase the pause between phrases, if only slightly. As the song gets louder, perhaps speed things up slightly. Where it is quieter, pull back on the tempo a bit. It will make the song much more organic! And I'm sure you know how to work tempo changes in your software.
I realize this is completely obvious information. As someone who has loves to play the piano (Though I'm not very good :P), I can't stress these points enough. Dynamics and rubato are crucial to this style! The bass notes starting at :17 sound very mechanical to me. Let them flow into one another. Slur them together! In any case, this is a nice piece and is full of potential. Just work on humanizing it, and you'll be a formidable composer when it comes to the piano! >:-D
I can't wait to hear more,
~Blaze