Okay, the concept of a civil service guild that whose job involves capturing hypnotic monsters goes VERY hard

That concept could honestly be expanded into a whole game. Start off by rounding up some low-grade thralls, slowly escalate as you gain skills and willpower, end up  wrangling deity-level threats like the one we faced here. You could have a lot of fun with status effects, different ways of hypnotizing different opponents, etc. As a PoC for that concept, this is VERY good.

Two things i might suggest if you choose to pursue that are:

- Clarity of the text. As others have mentioned, big blocks of text without commas are hard to parse. The backgrounds for the endings might also stand to be a little dimmer; both the art and the text are good, but both have so much going on that it's hard to focus on either.

- Feedback during gameplay. During my first run, I thought the arrow keys were broken because they didn't affect the mirror. Something as small as shifting the mirror a little when an arrow key is pressed might go a long way towards making the gameplay feel intuitive.

Very fun concept. Solid art, solid writing, solid music; an all-around solid entry.

It took me one time failing to get the hang of the controls, but the second time through was exciting! I personally found myself trying instinctively to use the arrow keys to change mirror placement and space to attack and had to overcome that, but once I did it was a fun little arcade experience. Love the inclusion of the dialogue and endings to give the gameplay some context, too! I think highlighting the portrait of the character who's currently talking would be a nice addition for clarity, but the writing was really charming.

The music and art are amazing. Very nice!

I wanted to note that the text is a bit hard to read against the background. It was somewhat energy-consuming to read the exposition and controls, and I think it would be improved if the text were broken up more throughout gameplay and was against a different colored background. 

That being said, I loved it!

really nice art!