It all looks a bit wonky and maybe I should have blocked each square, but to be honest I've tried blocking cotton before and it wasn't very successful, plus took ages to dry! I'm hoping that it will add to the homespun charm in the end and that the border edging will straighten it out.
Can you see that the middle of the 12-round square is really wonky? I adjusted the pattern slightly to try and straighten things up, which seems to have worked on each individual square. Perhaps as each square gets joined together on every side it may look better. I'm fussy, I know!