Criticism -
I'll mention audio, but I know you said you didn't have time to get to it so I'll move on. The main thing is that I feel like you should've integrated the theme more into the moment to moment gameplay/combat. Making the theme tie closer to the gameplay would give it a much stronger connection to the theme, but what you did is still pretty good.
Support -
The art was super nice and so was the boss design, I liked how every time you had to approach the boss differently because you had different/less items.