I thought the main character's dash attack was pretty unique. Since there's a lot of top-down shooters in the jam, I was half-expecting to be shooting things, but was pleasantly surprised and refreshed. I also like the vibe and music of the game - it was suiting for a retro dungeon crawler.
My main feedback is that there didn't feel like there was a compelling enough reason to fight the monsters (since you can easily run past them) or gather coins. I did find the heart pool room, which was neat! I would have loved to see more variation in the rooms, though I can understand the jam has a pretty short time limit to get things done.
Overall, I had fun! Nice job with this!