The game has an engaging core mechanic. And I always like MSPaint art. :)
I would say the main thing that would help is to display more information. It was not clear how much damage the attacks were doing, how damaged the buildings were, how anything was contributing to the amount of Faith I was gathering, etc. Like I was confused why my population died out when I had only lost one building. That sort of feedback helps guide the player to engage with the same strategically.