I didn't add the music in because I didn't have time by the end of the deadline, and completely forgot about it ;-;
Though now that the voting deadline ended, I've added in music and other stuff based on feedback I got during this jam, so feel free to try the game again for a new experience if you wish. I may adjust the last boss's hp though and update the enemy patterns a bit.
Thanks a lot for playing the game! I appreciate the feedback :)