The Decent into Madness (Test Post)

[Aadibah]

screaming voices

I wouldn't use "voices" so quickly after the previous sentence. There are times in writing where this does work, but personally it feels like repetitiveness.

He left hand

"His"

sending his hand pressing

Same issue as before with using the same word too quickly.

volatile manner

This is more of a personal nitpick, but I would say "violent" instead.

soft patter noise

Try instead "with a soft patter, patter, patter noise". Makes it sound slower, with short fits.

killed for his

Just "by his actions" is alright.

from the city walls

Try "the tall walls that made him feel so claustrophobic".

steady until you could

Again most likely a personal nitpick, but I'd go with "until one could".

Overall, I like it. 8/10, you gave effort, probably should try more show rather than tell (show Koal's reactions, his movements, his facial expressions, his physiological processes) which I admit is very difficult to avoid and I find it hard getting past a lot myself. In the end though, I like it, good stuff.