I like the concept and the art. And congrats on finishing your first game jam! (I was participating for the first time too and finished as well)
I think you need to give some feedback to the player in regards to what happens, like, what is the cost of different tiles and what resources they produce (and yeah, I know a lot of goals in a short game jam, but for the sake of giving feedback))). Since everything happens so quickly it's not clear what to do. Maybe having turns instead of changes happening every second would give enough info to the player to make decisions.
Anyway, good job!