Love the art style. Reminds me of Yoshi's Crafted World a bit.
One thing that I would change to the gameplay loop is that when you kill all the enemies you can automatically continue to the next level with all characters, now it kinda feels like a task when you have 13 different animals that you need to slowly walk to the exit. This takes the flow out of the game play loop a bit I want to go to the next level since I'm excited to see the other characters. :D
Very good character design, so many different characters and different abilities.