"Ha!" I thought. "This is so easy!" I just watched the stats and placed tiles accordingly while being careful to block off the opponent so it wouldn't have too much space. Then a year before the colonists were due to arrive a capital city sprung up out of nowhere and messed up my stats so I had to bomb it on the last round and then I won. I laughed.
Then I played a few more games and the objectives were a little bit more difficult to reach and the AI was a bit more aggressive and so I lost (and understood why people were saying it can be difficult). I also had a game where the best approach was just making craters for about the last 20 moves until I won with a crater filled industrial wasteland "paradise" with just a little bit of greenery and water near my lander.
I really liked this. It is so polished. Well done! The art looks great and I loved the interface. I also really enjoyed discovering the combos, as well as the variety in the replay because the objectives change. This was just a great experience all round.
One small thing: I had to crank the audio on my computer almost to max to hear the music (I didn't realise there was any until I saw people mentioning it in the comments). It also turns out I didn't actually hear the nuances of the audio either. So, really good music and audio design too.
Once again, great job! Congrats.