I really enjoyed this one -the ease of placing room tiles (Having them snap into place, the controls being intuitive, and the really clean tutorial) was a great addition, especially for a jam game. The game loop is also pretty fun, you somehow managed to make the experience of fine tuning level balance enjoyable. The presentation is also really good, the game is super duper readable and the art style is nicely polished. The mechanic of keeping the game "fun" for the player also made immediate sense, the little meter on the top left really helped make that clear.
That said, there's a few things that stick out - like the player being able to pick up potions through walls (My first dungeon had him explore through the hordes to find extra potions, only to find out he could just pick them up on the way to the exit), and the inability to remove skeletons or potions I had already placed down (Not making rooms removable make sense, but not being able to remove objects meant that I ended up with a dungeon balanced by filling the room with skeletons and potions everywhere, which felt very cluttered). Also, sometimes the player would wander off to go fight random skeletons on the other end of the map, but that didn't feel as buggy as the other stuff.
This game is really good overall! Would love to see this expanded into a full, "non-jam" release somehow.