Like the idea of using cards to place the monster and items, and instead of defeating the hero, you need to guide and support the hero in their quest for success.
I use a similar idea that you build a dungeon, but the purpose of it is to make it exciting for the player in my game too. Great to see that great mind thinks alike.
I really like this game, however, I face a bug where I clicked a card attempting to put it on the map but it disappear instead, making me hard stuck and needing to restart the game multiple times.