adorable piece :3
but i can point a few things that could be improved for the next time

at 0.15 there a piano line that keeps on BAMBAMBAMBAMing all the way and it begins to sound very monotonous and just in general ... fl - piano roll - down below there are these "sticks" that regulate velocity, if you mess around with those and make some of the notes louder and some quieter it would add a lot of realism and just would make it a lot better.