This is really charming, I was seeing Pidgeys flying around in my head when I listened to this haha. I like the structure and melody, and I think a bit more variety in the sound would really help this piece come to life. For the piano version, a quick and easy way to diversify your sound palette would be to play around with moving the melody up and down octaves in various sections to give it different timbre. Also, varying the rhythm of the left hand when the music comes back to the first theme at 0:50 by using syncopations and such might help make the return to the original melody sound even more special and nice. Overall, great job!