Bach? I thought it was more like Mozart. Just my ears, I guess.
The piece seems to flow, that's good. There are Rhythmic compensations tough.
The Burlesque in G major has been an influence on you I guess

I don't know if you're serious about composing music, I'll respond considering that you are.
Harmony knowledge doesn't contribute very much to this kind of music. It's pretty much instinctual. But you should study theory intensely if you want to improve and find your own sound.
Study counterpoint and write variations to pieces you play or melodies you like, for example.