Mind the pulse. Your by no means alone in this, but the pulse is on the bass note, and the first of the top notes in each figure. You emphasise the last of the top notes equally with the first later in the work. It's commonly done, but it's wrong.
Other than that, it's rather slow for my tastes.
Nice an even throughout, tempowise.
Don't agree with awesome_o that the fugue is usually done, but it really should be.