Hi pianistimo,
I am constantly amazed at your versatility and how quickly you learn new pieces! As far as comments on your prelude and fugue, I note that you sped up the prelude, so it may not sound exactly like that. I am hearing it in 2/2 although it is in 4/4 time. My feeling is, this tempo is fast and could even be a bit slower--but for sure, lengthen the LH notes a little and play all of them evenly. The fugue is nice, although I think needs to be faster--the dotted rhythms seem a bit suspended in mid-air with nowhere to go.
Anyway, great start on this!
Teresa