It's not bad, but it's not great either. It's highly repetitive, even though you tried changing the melodic line by the end of both the piano and the beat. Also, it lacks diversity; throughout the melody, you've been using single notes with the same regularity. It's a good start though, since it's the first song you've finished. As I said, it doesn't sound bad. It just doesn't sound good either, so good luck on your next workings!