Interesting game, I'm particularly fond of dungeon making games. I love the different ways you can make use of the room placement and dungeon layout to your advantage. Only issue I have is that its a bit hard to see what's going on with the room probabilities, the monster damage, and the hero's stats. Maybe for a post-jam update some kind of animation or cut scene when an event occurs could help illustrate the changes better?
Something which might make the probabilities a bit easier to manage would be having tiles with equally possible outcomes. For example the first few tiles have exactly one possible outcome then you introduce tiles with two equally likely outcomes (e.g. [Yellow or Blue 5dmg monster], [Yellow 10dmg monster or Pink 20Pow] etc.). Then it goes on to tiles with three equally possible outcomes.
Bug: If the hero dies whilst moving to another room (e.g. they encounter an undead) they still continue moving about the dungeon and reaching their destination can heal them.