I think your SFX are perfect. I was trying to do a similar enemy battle cry one, but you pulled it off better.
If it was my game, if you selected a bunch of Ghouls, I would offset the SFX and have it play for each so you could hear how many you got.
I heard what I thought was the ghoul sound in the music. Don't do that or the player may think they accidentally selected a ghoul even if they didn't.
When reading the prompt, I was imagining medieval Europe, but this is decidedly more foreign sounding.
Good background music. Enough of a melody for you to know there is one, but it is subtle enough to not get annoying too fast.