Very fun concept that has a lot of strategy to it. I like the interactions between enemies, especially using the bomb enemy to blow up surrounding ones, which feels very powerful. I think that the coins are somewhat useless at the moment, since they don't contribute to much and I don't think there's a reason to have the player move to one area of the screen necessarily. A cool mechanic for the coin would be a shop where the player can buy certain cards with their collected coins (maybe even some shop-exclusive cards). The cards all still feel very balanced and enjoyable to use, card placement is the only thing I would improve. There's definitely a lot you can do with this idea if you are to continue this post-jam. Great work!