That is so clever! I actually had a similar concept in mind at first with something circular growing in a building (or in this case planting) game. Decided to pursue other ideas, but I am glad to see something like this existing in the jam and it has far better idea standing behind it than I was able to come up with.
It took me some time to fully get what I was doing and what I was supposed to do but overall it was a smooth experience. A dating sim element caught me a little bit by surprise too!
While this is a jam game and simple graphics are expected, I feel that the concept for the game calls for a post-jam update with some very fancy effects like falling leaves, snow and lighting changes in the circles.
Very glad I had a chance to play this. I needed a cozy game in my jam experience :)
Cheers!