Nice concept and well executed! Gentle and relaxing game to play, great to have the instructions on the menu screen, really helped me pick up and play straightaway.
Personally, I kept getting confused by the movement controls. Intuitively, I kept pressing A and D and expecting to rotate and W and S to be forward and back. Might just be me though.
If you keep working on this, perhaps be interesting to have more competition for resources, making it harder to reach your population target and needing some strategy to get there.
Great work!