I think it's a very good game. The art here is very nice and overall I really liked it. I love tower defense games. This reminds me of Angry Birds, which I played when I was young, although Angry Birds is not tower defense, but it looks very similar and I enjoyed it.
It seems to me that it is very short. In fact, it seems to me that it ends when you start to enjoy it. I would be very pleased to have a wave system here and if the king's HP was not so small. I also don't know how this game connects with the jam theme. If I hadn't read the submission page of this game, I probably wouldn't have seen the connection with the theme.
Overall, I think it's a great game that is fun and looks nice. The idea is also perfect. The only thing that bothers me is that the game is short, but of course I understand that the time to create this great work was short. Really good work!