Thanks for the feedback!
Glad you enjoyed the music. It's actually the part of the game I'm the least confident of during the making process since I'm not a composer and composing a music usually takes a week for me. Tbh this time I kind of... modeled it after some certain musics; take a listen to this:
Ikr regarding the diff curve. I know it's getting too easy even though I keep summoning more and more demons m(_ _)m
More mobs is def a great idea. A faster type of demons is def needed here. Maybe ranged attackers and demons that CAN affect the player's ability to just rush to the angels too.