A nice short entry that managed to balance the difficulty just about right for me.
I liked the artstyle! The cartoony enemies and weapons combined with the rather brutalist UI and environment was a good match.
The progression I think have been made a bit better and obvious I think if each power upgrade increased the players health as well. Because while improving the defense and dodge likely did something, and the attack upgrades I think were noticeable, even just a small health bump would give a more tangible difference to the player.
And while the ending is aburpt I found the little drawing at the end to be very charming! Good work!