Amazing game! I was blown away. I loved every part of it. I am a big fan of rhythm games with action in it like Crypt of the Necrodancer. I beat it on my 3rd try, and I liked it so much, I beat it again. I think no change in difficulty is necessary, it is a perfect first level for anyone who has some experience in rhythm games. I also like that you have lots of adorable little conversations, it really adds to the feel and theme of the game. Very well polished. Love the Undertale vibe from those skull blasters and spears too. My only suggestion is to make the arrows more in tune with what’s going on in the music, because it didn’t feel right at certain times; for example, if the same note was played again in the music, I would expect the same arrow to play that note. Somehow it didn’t feel right at certain times, but at other times, it feels amazingly good.
I am a fan of this game, and hope you turn this into a full game with more levels! This is really one of the best!