Thanks so much for the review and feedback!
Yes, we didn't end up with a whole lot of time for balance once we put in all of the features and fixed several bugs that cropped up. We would love it if we get time post jam to make more cards and work on balancing the levels more and adding more levels and enemies as well!
It can definitely get easy, especially depending on what cards you end up with to slot into your towers! Were you able to make it past all 3 levels?