First and foremost, I absolutely adore the art (which reminds me of Don't Starve) and music.
The concept of being a dungeon master seems one of the more common ideas in this jam, but having to keep the heroes alive is a nice twist. And the chat is funny.
My only gripe pretty much is more polish and stuff. For example, attack animations, health indicators and so on. And maybe make hero deaths more controllable.
Amazing job on the entry!