First of all, thanks for playing! The audio problem its really weird, its working for me and other people I sent the game. I think it happened me something similar once (but like with a bunch of games on itch) and I solved it by restarting my computer. Try doing that and if it still doesn't work, there's one of the tracks on the trailer if you want to get an idea of how the music sounds like.
Also I will try making an easy mode or something after the jam ends so it will be easier for new players. Thanks for all the feedback! :)