A creative approach! A neat twist on the idle game formula, the upgrades were mostly all worth it and the game play is entertaining to watch.
That being said, some more strategy would have been great, as climbing ladders + taking damage quickly falls to rng. Maybe if you could buy + sell dice during the dungeon as a way to influence your rolls? I also didn't really like how you had to return to the main menu before trying another run, though that's a very minor issue.
Overall a very solid entry! I had a good time, the idea is fresh and very well presented! Would love to see an expanded version with a few more mechanics :) Good work!