Beautiful minimalist art style! Which program did you use? I love the black and whit, and the koala idea was a very nice touch. Other than that I tend to agree with the others, some music and SFX would add some juice to those beautiful attack animations! Nothing wrong with grabbing some royalty free assets to fill in the gaps when you're short-handed. Our SFX guy ghosted, so we grabbed some stuff from zapslat.com Keep up the awesome work and I'll look forward to your next project!
PS: it was nice to see a top-down game, I usually think platformer Metroidvania, but this style is really good for exploring!