During my initial testing of the game I think fire damage was handled correctly, and the combat is meant to be pretty challenging.
Also about the sfx stuff, i completely agree that the lack of music/sfx does harm the game, we did work on an OST and sound effects but we thought that the music we made did not fit with the theme of the game and could hurt it even more.
Thank you very much for the feedback!
After the voting period ends for this jam, I might create a new OST and add sound effects.