Great game! Makes you think while not being super stressful, and the visual/sound design is very good!
However, I seem to have run into an issue on the 2nd stage, where the building that (I assume) would allow me to place/create an arid biome is just... Not appearing in the buildings tab? It's a very vexing problem, as I see it in others' screenshots.
10/10 in all other aspects though!
ETA: Closing and restarting the game knocked it out of it's mild fuge and allowed progression, so I'm left assuming the building was just not needed for that stage.