A very unique game which I have seen in this jam specifically, I like the idle nature of the game. It is pretty satisfying to add and upgrade everything to see enemies being melted and seeing all those gems pour in. However, a little bit more work on the UI for readability and explanation, it would be awesome. Maybe a button to line up all the attack cards and defense cards or something like a grid where cards get automatically placed and you can scroll through all your cards would be a very big improvement on the UI. Well-done on the submission, you nailed the progression system, would have loved to see more stuff in the gem shop as well.