Really clean pixel art, and a great soundtrack! I like the particle systems when taking and dealing hits. Constantly picking up and throwing weapons, replacing them, and brawling was fast and responsive.
One thing I would experiment with is adding some "hitstop" to really sell the impacts. You can tune this differently for both regular hits and kills, and would make your melee strikes feel a lot more visceral. Additionally, I kept trying to hit enemies as they entered, and the downtime while waiting for their health to become active broke the flow a bit.
With a few more enemy types and some milestones/upgrades, this could be a really fun high-score game! Well done!