Nice mix of Harvest Moon and tower defense!
I was confused at first, it would be nice if the controls and instructions were slowly introduced to the player when the game starts, but I caught on fast. I love how quickly you can move while holding shift, and I really love that you can attack as fast as you can click. I encountered a bug where I hired one knight, and then after walking away from the barn, when I attacked an enemy it continued to buy new knights.
I had a lot of fun, nice job!