This was very, very fun! I love the buildings destroying surrounding slots, though that really could've used some overlay to demonstrate the area.
The skyscrapers should also have some control to where they fall. Most buildings could use a hit less, I feel.
It wasn't very clear that the sea rising was also bad for you; I realised only halfway through a session that like, if you had 3 land tiles, a single house would occupy 33%! I lost with a score of 19835.
If you plan to continue this project, consider more area destructions from other building types (Cross? Only diagonals?) and more terrain interactions!