The look of the game is nice and the music and sound work well.
I didn't personally enjoy the game I may have been playing it wrong. I think you were suppose to spend your time scouring the map to find resource to click on. So that you could then purchase new knights to help defend the towers. The issue was that I then never really go to witness much of the fighting or get invested in the tower or its defense. I felt disconnected from the main event that was happening in the game.
That said you seem to have done really well in making all this for the Jam and its a solid enough submission.