This is a great proof of concept project. The art and music particularly shine and I think that more polish would turn this into a great project. I want to emphasize that there is a lot of quality with the demo content, it’s just not yet finished.
Regarding feedback, I often found myself confused or expecting things that did not happen. I frequently tried to do things that were not yet implemented or were buggy (For example, I once attacked a character with my archer from two tiles away. The archer never fired, but the enemy swordsman got a free hit on my unit). I was also confused at how the numbers on the GUI (hit-chance, damage, etc.) did not reflect actual combat results.