The art style (unique for VNs, especially on itch!) is what got me to stop and take a second look, but the writing kept me playing all the way to the end... even when I was supposed to only spend a few minutes previewing it. XD
Seriously, well done. As someone who has experienced brief instances of derealization before (but not for a long time now, thankfully), I wasn't triggered, but I was impressed with the nuances of this story—especially considering it was made in just a month.
I even gave it a shout-out in my annual NaNoRenO spotlight post this year—here's the link if you'd like to check it out!
In any case, congrats on completing NaNo, and with such a cool entry at that. :)