I'm still baffled on how fun I had playing this. The sword physics and sounds set up more of a goofy mood, which I'm not sure if it's intended, but it still works well either way. Even though you used premade assets, I'm impressed by how well you used them. You had a great tutorial set up along with some really cool UI effects. There's plenty of player feedback (It's super satisfying to hit an enemy), and I'm also extremely impressed by how you communicated the player's health state without using any sort of health counter, bar, etc. You've achieved some very fun mechanics here!
On that note, the enemies did feel a bit unbalanced. They were extremely quick and have a bit too much health (Especially the boss, you gave me quite the heart attack). Although I did enjoy continually throwing the sword and hitting them, maybe next time have your enemies be a little bit easier to kill. Also (Mentioned a few times in other comments), there is a tad bit too much screen shake. Screen shake is good, but make sure there's not so much to the point where it's difficult to discern what's happening on screen. Have a tiny bit of screen shake when an enemy gets hit, and then have a bigger more impactful screen shake when that enemy is killed. If you get the amounts right, fighting enemies will be even more fun and satisfying.
I loved what you got here, and I wish you luck during the rest of the jam!