I managed to kill the boss, when you die to him he disappears and you have to restart, not a big deal if you're not as bad as I am at playing the game. I really like the sandbox approach, just get enough gold however you want in a quite open place then you can deal with the boss, that's super cool.
I'm very happy that you simply switched to instant movement, the game was much more fun to me that way. The combat system is fun and I thought the difficulty was pretty on point, I appreciate that.
I think the theme integration is weak but there are quite some story bits and texts here and I appreciate you're doing everything all by yourself up to the music.
Good job.