This is a cool concept; Simply love the groovy music! :)
Like the clean interface and cute little sprites
This feels like a minigame to me currently rather than a dungeon crawler. I'd love to see some sort of 'battle' mode where you fight the monster you encounter;
In my opinion, that is what is missing from the gameplay. (And I understand that those might not be your future plans for this and what I'm asking would require a lot of development; Like I said it is just my opinion :) )