You may be interested in an organist critics ;)
1. Not enjoyable to play definitively too far from Vierne or Jongen that used this kind of perpetuum of the hands. As soon as i looked at it i thought to those composers and they don't suffer comparison with yours. The main problem is cell of interest too short (1 measure with a lot of variations). However, there are some truly good things in it: Harmony, 11/8 (2+2+3+2+2) is original (but maybe too symetric or not fully exploited), particularly like mes 42to47.
2. Good Sarabande, but again too monorhythmic, or too close to the form. Look at Louis Couperin Sarabandes that can be played for Organ, how you can make some good use of the movement.
3. The minuet is very interesting mixing full part of traditional harmony and surprising (but not too much, which is good to me) with more modern harmony and chromaticism. And good sense of driving the melody, unless the previous movement
4. The gavotte has finally some counterpoint, that was missing from the beginning, well done... on the overall very similar to the minuet. One thing is the cadence which is original with these sixteenths but a very bad taste (In French we say "une faute de gout")
5. I found the Gigue boring probably due to the pedal that is breaking the gigue movement.
But on the overall and very original, I would say very promising and gave me enough to look out for your next organ work.