Thanks for taking the time to leave such a thorough review! I'm glad you enjoyed the game.
(1) There are some issues with shadows which was caused by a mistake I made while changing to a new rendering pipeline. It would most likely require a re-work of the entire project to fix and I don't think it affects the game too much.
(2) I see that you are running version 1.0. The flipping issue that you are talking about was fixed in version 1.2. along with many other problems.
(3) I agree that there should be something interesting in the buildings. I only really put furniture or boxes and barrels to fill the spaces out.