It seems ...
pretty empty. I think that might have to do with the samples, which imho are pretty poor. it really detracts from the peice. If the samples were better, it could have been a 4 / 9.
The melody is solid, if minimalist.
near the end, the paino rythem peice seems a bit off. Not sure if its timing or what. Kudos to you for actuall yplaying this as opposed to sequencing it, but its still missing something.