I LOVE the artstyle and how everything is animated, even the background.
Along with sounds and music it all fits together well and gives the game a lot of charm and personality.
One thing that would definetly add to the gameplay would be indicators about what are the enemies going to do.
I like the roguelike aspect but I quickly figured out what do you mean by unbalanced when the enemies deakt me for 9 damage in one turn on floor 5 :P