Thats pretty damn neat.
It is indeed a simple beat, but it is an effective beat.
My suggestions.
I don't know if the percussional work actually benefits this piece shooting. I think removing the percussional stuff might actually make this sound better. This sounds like a song that would rely on itself to set a beat and pace. The piano does this plenty fine.
The strings should be a bit louder, I think they make for a great support instrument with the piano, and should be more supportive by being louder.
Have you considered putting in a little triangle ping, just weaving into the background? I feel that may add some interesting flavour.
I know this is a song you made to learn how to use the program, and i'm quite pleased at the skill you demonstrate already.
Great stuff shootingBLiND. 4/5 from me, keep them coming ^^.