Ooooo, loved it! The art style is consistent and combat feels cool! I loved kiting that big purple spire. Especially the tavern and Luigi - those where awesome!
One thing I could suggest is the proper layering, cause sometimes the props where in front/back to the player, so I think also some borders are needeed.
And some of the UI designs in title screen could have been better.
But the style was consistent throughout the game!
Overall, I loved this entry!