When Bruce said that they were heading to Kansas, of course I thought that meant Smallville, and I started to wonder about the Kents. In the old Superboy comics, they moved into town when Clark was a kid and ran the general store. I was thinking that it would be cool if you had them running the general store since here they didn't have Clark to help them out on the farm.
I don't know whether you meant Jonathan's General Store and Martha's Closet to be references to the old comics, but I really like what you did with them in Clark's absence. I especially like that you played up Martha's art projects. One of the things I always liked about the Kents' characterizations on the show was that Martha, in particular, had hobbies and interests not related to being a farmer. She was a very well fleshed-out character. You built on that well and took them in a very believable direction.
Hiya!
I've actually never been into the comics so it's quite the happy random coincidence that I had Jonathan and Martha running stores (and the General Store to boot!). I, like you, always loved that Martha had all these various interests and hobbies throughout the series - one episode she was making art, another she was into lasers, etc. So, of course, I had to throw that in. If anything, I think she would have thrown herself even more into her hobbies without her child in her life.
Thanks for reading!