Prelude and fugue in C

I'm learning to play the piano (two-handed) and I was practising Bach's Prelude and Fugue in C (BWV846). Well, just the Prelude, the Fugue is significantly harder. So I imagined an exasperated neighbour having to listen to my attempts at the Prelude too many times.

This is the first appearance of the mouse as a silent commentator. I liked him so I kept him from then on.