Hi!
I really like the concept of your juice. The only thing I notice lacking is some variety in the enemies. You could add a rouge like system, which after each death you can have different improvements or different princesses and soldiers.
If you continue with the project let me know;)
And if you want to help me, you can try my game and rate it: https://itch.io/jam/brackeys-5/rate/928266
Edit: I was playing the game again and I got this error when taking damage with the soldier.: