Cool concept and nice relaxing gameplay! I thought it fit the theme really well, and it was really satisfying to watch my planet grow.
If you were to expand on this, I would maybe consider adding a gamemode where non-like tiles give adjacency bonuses, rather than like tiles, and see how that impacts the gameplay. It may make planning a little more difficult and force the player to get creative about how they're going to lay everything out.
Overall though I thought this was a cool entry and I definitely see a path to expand this with more biomes! Great job!