The quality is pretty low because i got a default audio soundcard at the moment but soon I will replace it with some good audio interface for higher quality.
With the piano, I would focus on playing those notes in legato. I feel like you may want them to be contrasting to the rest of the song with each note really being played with a high velocity, but I feel like its over-contrasting in its current form. I would decrease the velocity of the notes and really focus on connecting the notes together.