fun fact; there is no marking! Bach didn't do that stuff.
Or maybe you think Presto is what it says on the metronome: 168-200 or something like that. I don't think there was any harm in playing it at your tempo though. It was pretty good.
Presto is 138-168. I am at almost exactly 140. And that's pretty much what Schiff plays too.
And Emily, I was just messing around. It was a first try. If I were to make it a real recording, I would do it on my piano, with my recorder, and I would probably try a few times before I was satisfied.