Wow, this is the whole package. Love the layered soundtrack, love the graphics, love the enemy variety, love townbuilding mechanics, loved having to properly allocate resources to improve the RPG progression, it's all great. Even had a story, solid tutorial, and ending cutscene; I'm very jealous of your time management that you did this in 48 hours. So because I like it so much I'm going to try my best to nitpick it.
Population was under explained. I didn't realize that injuries/death actually put my townfolk out of commission until I accidentally stumbled over the townfolk status dropdown menu. I wasn't sure why I was suddenly able to recruit more townfolk at times until I realized that the castle upgrades were also increasing housing.
UI was already quite smooth but I think it could go even further by allowing the player to simply click outside a building's window to close it rather than hunting down the x button.
An option to speed up animations on the enemy turn would have been nice.
Going all in on a single unit type (in my case mages) seems like it could be a dominant strategy, which is unfortunate because I think all three are cool.
My perfectionist ass wanted to keep resetting the game until I could get an ideal feeling start, but using the new game option would play the opening cutscene, then skip the tutorial (all good so far) but then I was unable to build any buildings. I had to refresh to make it enable again.
You've had this reported before but rapidly clicking on an enemy allows you to hit it multiple times.
Again, I want to emphasize that I'm only looking this hard for things that are I love this game and hope to help you improve it and future work. Amazing work!