Looks interesting, so I started a playthrough. It seems like food sources are locked behind green science; is it expected to end up needing to respawn a lot at the beginning? I'm not necessarily opposed to that, but you may want to set expectations in the starting message in that case.

I see that there's something about berries, but I haven't found any yet; maybe just got an unlucky start.

Okay I remembered the existence of fish.

Berries don't spawn on dessert tiles so desserts so they are much harder to start in compared to forests. Berries are very useful for early nutrient/spoilage production so there should be some somewhat close so they can be collected and brought back to your factory. Let me know if this is a problem for you and I may alter their generation or add a setting to spawn them on desert tiles.