Birthday music, woot
It's decent piano playing, with some cool ideas and periodic tasty dissonance (I like dissonance). It's well recorded and quite enjoyable - it reminds me of the Peanuts :)
I've got to say, though - it's quite repetitive, there. From time to time it changes the idea up a little, but overall the two chords you use really get beaten down until they're just not interesting anymore. You need to change it up more often, there.
Best of luck with your future tracks!