Thanks for playing and the kind words, I was working on this right up until the end of the Jam so I ran out of time to implement a proper tutorial sadly. I ended up writing up a how to play on the games page after the Jam ended just so people wouldn't be confused.
I've gotten feedback on the enemy HP and unfortunately I didn't make any HP bars for them, oversight because I thought thematically it would be cool if there was some ambiguity if you killed them or not, kinda like two samurai clashing swords. But game-play wise I see it doesn't really feel good for the player.