I did compose the music and make all the sound effects myself. I even recorded my girlfriend for the voice of the character. Sadly, there was a bug with the web export where the volume of some of the sound effect got all messed up, and I didn't have time to fix it. I had a footstep sound effect that had to be removed because it was super loud in the web export.
I also never encountered the softlock in the dungeon where testing, so I am not sure what causes it exactly. Overall I definitively should have decided on a smaller idea so that I could have more time for playtesting, balance and polishing. Still, I am happy that I managed to finish this, it had been years since the last time I submitted something fora game jam.